Ronstan Series 40 All Purpose Blocks
Use them anywhere - Ronstan's all purpose (AP) blocks are a great all round solution. Self-lubricating Acetal polymer sheaves running on polished Stainless Steel races perform equally well with dynamic loads and high static loads. For durabilty and a long service life, these blocks are the right choice for sheets, halyards and control line applications for cruising and racing.
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