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Description
Ronstan Series 15 Ball Bearing Utility Block - Single, Swivel Hook HeadSeries 15 Ball Bearing Utility Block Single, Swivel Hook Head Features: Smallest and lightest ball bearing block available Precision molded acetal sheave running on stainless steel ball bearings provide high performance & low friction Single loop head blocks include an O ring to separate running line from head lashing or fixing Applications: Dinghy control lines Vangs, cunninghams and tweakers Shock cord tensioning systems Materials: BB sheaves: UV
Series 15 Ball Bearing Utility Block - Single, Swivel Hook Head
Features:
- Smallest and lightest ball bearing block available
- Precision molded acetal sheave running on stainless steel ball bearings provide high performance & low friction
- Single loop head blocks include an O-ring to separate running line from head lashing or fixing
Applications:
- Dinghy control lines
- Vangs, cunninghams and tweakers
- Shock cord tensioning systems
Materials:
- BB sheaves: UV stabilized acetal
- Ball bearings: Stainless steel
- Cheeks: Grade 316 stainless steel
Manufacturer Part Numbers: RF15180
GRP:WRO
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
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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 ★★★★★
Based on 14 reviews
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Product Reviews
★★★★★ 5
Great resource
Format: Paperback
Great diagrams. Great resource/informational books. If any of your kids is curious about flight and physics. This is a great resource to have in a home, homeschool or classroom library!
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Reviewed in the United States on September 18, 2025
★★★★★ 5
Packed with ideas across most physics- a good purchase even for an adult.
Format: Paperback
Great information density! I though they did a good job of covering the basics to a higher resolution than I expected. I bought this for my 10 year old nephew, it's a bit out of his reach as far as information density- the pictures help a great deal but it is definitely a book that will require explanation for you ger children. I don't think it's ever too early to have exposure to this science.
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Reviewed in the United States on March 7, 2026
★★★★★ 5
Highly recommend!
Format: Paperback
Fantastic basically physics book! Illustrations are clear and concise, information is just the right combination of easy to understand but still deep enough.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 8, 2025
★★★★★ 5
Very good book
Format: Paperback
My son borrowed the book from local library, he kept reading and became very interested in physics. He asked me to buy one so he could read it anywhere anytime. We are very satisfied with this book.
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Reviewed in the United States on June 1, 2024
★★★★★ 5
Really great basic/intro to physi
Format: Paperback
Purchased as a birthday present for my very smart 14 year old grandson. The book gives simple discussions about most basic elements of physics. I’m hoping it is not too simple but not too complex. First look tells me I made a good choice. I may buy another one just to have around the house for other grand kids. I’ll give an update after he gets into it a bit.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 20, 2025
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