Series 40 All Purpose Blocks Series 40 Curved Cheek Block Base These all purpose blocks are used for mainsheet and halyard applications as well as vang and spinnaker control lines on off the beach boats and samll keelboats up to 26. Self lubricating Acetal polymer sheave High static and dynamic load capacity Impact modified, fiber reinforced and UV stabilized 316 stainless steel load straps and head fittings
)
