The Barton Size 0 Plain bearing block has 20mm (3/4") sheaves and is also available in ball bearing sheaves. Designed for high strength and performance
but lightweight with the range starting at only 13gms (0.5oz). Suitable for upto 6mm (1/4") rope Ideal for use on dinghies, day boats and smaller craft or lead blocks, flag
pennants etc. on larger yachts