The size 7 Barton high load ball bearing cruising block range is engineered for superior strength and performance. This is also offered in plain bearing sheave assemblies. Built with 70mm/2 13/16Ó sheaves and designed for a maximum rope size of 16mm - 5/8 rope. The range features high grade glass fibre nylon reinforced moulded side plates with internal 316 stainless steel frame that is through-bolted and riveted for added strength and durability. This well designed and versatile range is engineered for use on larger cruising and racing yachts and is compatible with our ball bearing mainsheet traveller system.