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Ronstan Wire Block - Tubular Rivet Head w/Nylatron® Sheave - 25mm (1") Sheave Diameter - RF418

Marsoni M251S
Sale price$22.99
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Ronstan Wire Block - Tubular Rivet Head w/Nylatron® Sheave - 25mm (1") Sheave Diameter - RF418Wire Block Tubular Rivet Head w Nylatron Sheave 25mm Sheave Diameter Wire blocks have purpose designed narrow sheaves and grooves. Applications: Wire blocks suit halyards, vang and backstay applications Materials: Grade 316 stainless steel cheeks Nylatron sheave Specifications: Sheave : 25mm(1") Max. Cable : 3mm(1 8") M. W. L: 450kg(990lbs) B. L.: 900kg(1,980lbs) Weight: 40kg(1. 4oz) Manufacturer : Ronstan Manufacturer Part No : RF418 UPC :
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4.0 ★★★★★
Based on 842 reviews
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wyo5
Boise, US
★★★★★ 5
Perfect
Size: Large, Color: Navy
Oooooo these are so nice and soft and so warm! I am a nurse and work in an old hospital that is getting remodeled and there have been days we haven’t had heat and I have been very happy that I purchased these. My scrubs glide very nicely over these and don’t add any bulk. Definitely worth every penny! The fit is spot on and they wash up really well.
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Reviewed in the United States on December 12, 2025
J
Verified Purchase
Jay Bay
Boise, US
★★★★★ 4
Warm and Comfortable for Everyday Wear
Size: XX-Large, Color: Light Grey
This thermal set is really comfortable and does a good job keeping you warm in colder weather. The fleece lining is soft and cozy without feeling too heavy, and it works well as a base layer under regular clothes. The fit is true to size with a nice amount of stretch, so it is easy to move around in and does not feel restrictive. It is also lightweight enough to wear throughout the day. The only reason for 4 stars instead of 5 is that it could be a little thicker for extremely cold temperatures, but it still works well for most everyday use. Overall, this is a solid and comfortable thermal set that is great for layering and staying warm. I would recommend it.
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Reviewed in the United States on March 27, 2026
L
Verified Purchase
Lak2968
Port Orchard, US
★★★★★ 5
Warm Thermals!
Size: Medium, Color: Black
Very comfortable and kept me warm in really cold conditions. Very soft and easy to wear.
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Reviewed in the United States on February 26, 2026
M
Verified Purchase
Mish
Massapequa, US
★★★★★ 5
Fit well
Size: Medium, Color: Black
Fit great and washed well
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Reviewed in the United States on March 2, 2026
L
Verified Purchase
Latrese T.
Pawtucket, US
★★★★★ 5
Buying more!
Size: Medium, Color: Black
Perfect fit and warmth.
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Reviewed in the United States on February 17, 2026

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