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Description
Frontier Rotor R-S4x250/4MI and AdaptersFrontier rotors extend the functionality of Frontier centrifuges by increasing the number of tubes of varied types and sizes that can be used in conjunction with each of the centrifuge models. Easy to clean and operate, the rotors are durably constructed to withstand demanding centrifugation. R S4x250 4MI Rotor Maximum Speed 4,500 rpm Maximum Relative Centrifuge Force (x g) 3,780 g Maximum Capacity (Rotor) 4 x 250 ml Tube diameter without adapter N A
Frontier rotors extend the functionality of Frontier centrifuges by increasing the number of tubes of varied types and sizes that can be used in conjunction with each of the centrifuge models. Easy to clean and operate, the rotors are durably constructed to withstand demanding centrifugation.
R-S4x250/4MI Rotor
| Maximum Speed | 4,500 rpm |
| Maximum Relative Centrifuge Force (x g) | 3,780 g |
| Maximum Capacity (Rotor) | 4 x 250 ml |
| Tube diameter without adapter | N/A |
| Outer/Inner Radius | 167 mm |
| Rotor Style | Swing out |
| Aerosol tight | Not applicable |
| Acceleration Time (sec) | 34 / 309 |
| Angle | 0-90° |
| Compatible Models | FC5816; FC5816R |
| Deceleration Time (sec) | 34 / 458 |
| Dimensions (LxØ) | 13.31 in (338 mm) |
| Maximum loading weight | 2,144 g |
| Multiple Maximum Speeds | No |
| Net Weight | 8.96 lb (4.06 kg) |
| Working Environment | -4°F – 122°F, 95%RH, non-condensing (Temperature: -20ºC – 50ºC, Humidity: < 95%) |
Available Adapters:
- 5x4-10ml D16mm Sar 2/pk Rack
- 7x5-7ml D13mm Vac 2/pk Rack
- 7x5-7ml D13mm RB 2/pk Rack
- 9x4.5ml D12mm FB 2/pk Rack
- 10x1.5ml D11mm 2/pk Rack
- 9x5-7ml D13mm RB 2/pk Rack
- 7x15ml D17mm RB 2/pk Rack
- 1x15ml D17mm Rim 2/pk Rack
- 2x15ml D17mm FA 2/pk Rack
- 1x25ml D25mm RB 2/pk Rack
- 1x30ml D25mm Rim 2/pk Rack
- 1x50ml D29mm Rim 2/pk Rack
- 1x50ml D29mm FA 2/pk Rack
- 1x50ml D29mm RB 2/pk Rack
- 1x50ml D34mm RB 2/pk Rack
- 1x85ml D38mm RB 2/pk Rack
- 1x100ml D46mm RB 2/pk Rack
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
4.8 ★★★★★
Based on 12 reviews
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Product Reviews
★★★★★ 5
Great dressy sneaker to wear with business casual or jeans
Size: 11, Color: British Tan/Ivry
I got these for my husband to wear with jeans or business casual dress pants. They look sharp and professional and dress up jeans if you're going out. He says they fit comfortably and he can walk on them all day without his feet hurting. They are beautiful genuine leather so they don't get stinky. I got my husband's normal size and they fit to size.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 11, 2026
★★★★★ 4
Comfortable
Size: 9, Color: Black/Ivory
Most comfortable and roomy shoes I ever wore. Great for insoles. Looks nice too. The base of the shoe is a bit too thick but it’s fine.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on September 5, 2025
★★★★★ 5
Look and feel awesome!
Size: 11.5, Color: Optic White/Opti
These are awesome shoes - look great really, really white and clean! Love how comfortable they are - and soooo light. I was a little worried they'd get dirty easily, but I've been able to keep them clean. Fit as expected. If you're looking for a great, comfortable, and affordable shoe, check these out!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 4, 2025
★★★★★ 5
Great shoe, comfort
Size: 11.5, Color: British Tan/Ivry
Love these shoes, they're super comfy. Laces stayed tied all day. I wear them in a business casual environment, or if I'm going out for a nice meal with my wife. They look good, the color is unassuming and neutral. they also elevate my height, I feel like it gives me an inch or so more versus regular shoes. This is my second pair!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 30, 2026
★★★★★ 5
Good shoes
Size: 7, Color: British Tan/Ivry, Size: 7, Color: British Tan/Ivry
Look very nice these shoes, speally to go out to dinner with the family, are really light weight, great quelith, and great softness
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 8, 2026
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