Series 40 All Purpose Block - Triple - Swivel HeadFeatures: Exceptionally high working loads; Low maintenance, long service life; Self-lubricating sheave; Slotted pin shackle eliminates fouled lines; Two way head post; Spare parts - RF41010 Replacement Becket Pin, RF150 Shackle; All purpose (AP) blocks are a great all around solution. Self-lubricating Acetal polymer sheaves running on polished stainless steel races perform equally well with dynamic loads and high static loads. For durability and a long service life, these blocks are the right choice for sheets, halyards and control line applications for cruising and racing.Applications: Mainsheet; Halyard; Vang; Spinnaker control lines on off-the-beach catamarans, one design classes and sportsboats up to 8m (26ft); Materials: U.V. stabilised Acetal sheaves; Impact and U.V. resistant, fibre reinforced Nylon cheeks; Grade 316 stainless steel bearing race; Grade 316 stainless steel load strap and head fitting; Sheave: UV stabilised acetal; Cheeks: Impact modified, fiber reinforced and UV stabilized nylon; - cis2:mm5mnJlm -