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Description
Ronstan Orbit Series 55 Double Becket Block w/ Swivel HeadProduct Description Orbit Series 55 Double Becket Block w Swivel Head Features Ultra Lightweight Low friction 2 stage Orbital ball bearing system Highest working load in its class Low profile and compact High performance cleating Swivel shackle head for unlimited block rotation. Stainless steel shackle head for ultimate durability and compatibility with harsh fixing points. Ultra low profile integrated beckets. Sheave 2 5 32 in. Max. Rope 3 8 in. Max.
Product Description
Orbit Series 55 Double Becket Block w/ Swivel Head
Features
Ultra Lightweight
Low friction 2-stage Orbital ball bearing system
Highest working load in its class
Low profile and compact
High performance cleating
Swivel shackle head for unlimited block rotation.
Stainless steel shackle head for ultimate durability and compatibility with harsh fixing points.
Ultra low profile integrated beckets.
Sheave - 2 5/32 in.
Max. Rope - 3/8 in.
Max. Cable - in
Pin - in.
M.W.L. - 1650 lb.
B. L. - 3300 lb.
Weight - 6.1 oz.
Product Information
Lightweight
Kilogram for kilogram of working load, BB and RT Orbit Blocksa are the worlda's lightest. The unique orbital design allows the bearing to only be in the active areas of the floating sheave. This minimizes the mass of the inactive return race and hub.
Weight and bulk are further reduced in the different block configurations. The ball bearing single and becket block has a through-sheave becket arrangement. The result? The lowest weight possible.
Multi-sheave blocks have only single intermediate cheeks and an ultra-light and efficient head arrangement. This gives a 30% weight saving advantage over the nearest competitor. Other brands just link together their single blocks. This results in unnecessary double cheeks between each sheave, held together by a heavy steel channel across the top of the block.
Highest working load in its class
The orbital ball-bearing arrangement gives the largest possible bearing race diameter. This maximizes load performance. The proven Ronstan 2-stage bearing system features high compression grade acetal ball bearings and a secondary full-contact bearing. This gives minimum friction across the full working load range.
The floating sheave and bearing system is supported by a fiber-reinforced load frame. The design was computer modeled to be stress optimized. The Dyneema Link is produced from FSE Robline SK75 fiber, which is 10 times stronger and lighter than steel, and provides the final connection from the block to the load point.
Holding power 20:1
Applications
Mainsheet systems on dinghies, sportsboats and small keelboats to 9m (30ft)
Spinnaker sheets on dinghies, sportsboats and small keel boats to 9m (30ft)
Halyard, Vang and Backstay application on boats to 8m (26ft)
Control line applications on larger yachts
Mainsheet systems and spinnaker sheets on dinghies, catamarans, sportsboats and small keel boats to 9m (30ft)
Halyard, vang and backstay applications on boats to 8m (26ft)
Control line applications on larger yachts
Materials
Ball bearings - High compression strength carbon black Acetal
Stage 2 bearing - Carbon fibre reinforced, PTFE impregnated Nylon
Frame/Cheeks - Toughened, glass fibre reinforced Nylon
Rope Link: UV stabilised, multi-strand impregmented SK75 Dyneema
Head fitting: grade 316 stainless steel
Ball Bearings: high compression strength carbon black Acetal
Features
Sheave - 2 5/32 in.
Max. Rope - 3/8 in.
Max. Cable - in
Pin - in.
M.W.L. - 1650 lb.
B. L. - 3300 lb.
Weight - 6.1 oz.
Product Information
Kilogram for kilogram of working load, BB and RT Orbit Blocksa are the worlda's lightest. The unique orbital design allows the bearing to only be in the active areas of the floating sheave. This minimizes the mass of the inactive return race and hub.
Weight and bulk are further reduced in the different block configurations. The ball bearing single and becket block has a through-sheave becket arrangement. The result? The lowest weight possible.
Multi-sheave blocks have only single intermediate cheeks and an ultra-light and efficient head arrangement. This gives a 30% weight saving advantage over the nearest competitor. Other brands just link together their single blocks. This results in unnecessary double cheeks between each sheave, held together by a heavy steel channel across the top of the block.
The orbital ball-bearing arrangement gives the largest possible bearing race diameter. This maximizes load performance. The proven Ronstan 2-stage bearing system features high compression grade acetal ball bearings and a secondary full-contact bearing. This gives minimum friction across the full working load range.
The floating sheave and bearing system is supported by a fiber-reinforced load frame. The design was computer modeled to be stress optimized. The Dyneema Link is produced from FSE Robline SK75 fiber, which is 10 times stronger and lighter than steel, and provides the final connection from the block to the load point.
Holding power 20:1
Applications
Materials
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.6 ★★★★★
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Product Reviews
★★★★★ 5
Good ingredients
Flavor Name: Bone Broth Variety Pack, Size: 3.5 Ounce (Pack of 6)
Great healthy quality baby food ingredients and tastes and smells great for my child.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 14, 2025
★★★★★ 5
Baby Approved!
Flavor Name: Bone Broth Variety Pack, Size: 3.5 Ounce (Pack of 6)
These are great! My son started eating these around 8 months old, now he’s over a year, and he loves them. He gets so excited when he sees one. The ingredients are of amazing quality and definitely soothes the worry of my mommy heart.😅 I’m so glad I’ve found this brand. This is the only brand I trust and it’s the only brand I buy!
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Reviewed in the United States on November 23, 2025
★★★★★ 5
Worth the Money By Far!
Flavor Name: Bone Broth Variety Pack, Size: 3.5 Ounce (Pack of 6)
My son is a huge fan of Serenity Kids! Worth the money every time I click Buy Now! Takes the guess work out of ingredient lists and meal times for parents and even other caregivers!
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Reviewed in the United States on January 22, 2026
★★★★★ 5
Baby loved them!
Flavor Name: Bone Broth Variety Pack, Size: 3.5 Ounce (Pack of 6)
Baby loved all the flavors! Perfect way to expose baby to diverse tastes and flavors. Tried some myself and they all tasted fairly good for being baby food.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 14, 2025
★★★★★ 1
Caused pooping spree
Flavor Name: Bone Broth Variety Pack, Size: 3.5 Ounce (Pack of 6)
Serenity Kids food pouches have caused my baby to have multiple pooping sprees. I bought the products due to the rave reviews and organic ingredients. But there are way too many ingredients in one pouch for a baby, and while everything looks clean, not everything is good for an immature digestive system. For example, apple cider vinegar might have been the trigger of one pooping spree. But there are so many ingredients in these pouches, making it hard to narrow it down. What has happened is that these and other Serenity Kids pouches have caused my baby to poop 4-5 times a day, at times 2 days in a row. It's awful to see the little one with a screaming red bottom and to hear her cry at the top of her lungs on the diaper changing station. Serenity Kids should be ashamed. For a company marketing itself as offering healthy foods to babies, it has failed spectacularly.
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Reviewed in the United States on March 18, 2026