Ronstan Series 25 AP Single Utility Block - Loop Head Sheave Diameter:25 mm THT-530 fits Groco Thru-hull Fitting

THT-530 fits Groco Thru-hull Fitting Sizes from 1/2" through 3"

Very easy to apply

Position wrench (4 different sizes)

and is resilient enough to absorb the stress of expansion

Silicone lubricant is available in both wet and dry formulas

Ronstan Series 25 AP Single Utility Block - Loop Head Sheave Diameter:25 mm THT-530 fits Groco Thru-hull FittingRonstan Series 25 All Purpose Single Utility Block, Loop Head RF571 Lightweight durable construction Economical Maintenance free Applications Vang, cunningham and trapeze retriever systems on dinghies Leech line tackles, bunk adjusters etc on larger yachts Materials UV stabilised Acetal sheaves Grade 316 stainless steel cheeks Specifications Sheave : 25 mm Max. Rope : 5 mm Max. Cable : mm Pin : mm MWL: 300 kg BL: 600 kg Weight: 15 g