Manufactured from marine grade aluminium and 'Spectro' grey anodised for high UV stability and durability. Sheaves are precision turned from solid 'Ertalyte' bar with a profile that is kind to modern ropes.Running on a large diameter centre bearing for easy running under high loads. Fitted with a stainless steel bow to allow for snag-free operation.Bolt-together construction not only adds to good looks, but allows for easy dismantling should servicing become necessary.Available in three sizes, these blocks are compatible with the toggle connections on our ball bearing mainsheet travelers.   Sheave Ø mm: 65  Sheave width mm: 18  Rope Ø mm: 16  Break Load kg: 1600 SWL(Kg): 800 Length mm: 142  Weight (g): 267