Series 40 blocks provide low friction, two stage ball bearing system for consistant performance over the full load range. Ideal for mainsheet and halyard applications as well as vang and spinnaker control lines on off-the-beach catamarans, one design classes and sprotsboats up to 26'.
Impact modified, fiber reinforced, and UV stabilized 1-3/16" Zytel cheeks
High load versions offer self-lubricating Nylatron sheaves with Trolon ball bearings
Standard versions have Acetal ball bearings and sheaves
316 stainless steel load straps and head fittings