Size 4 Ball Bearing Block Upright With fairlead. Fairlead prevents line falling away when not under load (see page 6 for setup diagram ‘Over the top’). Fastenings 5mm.

A strong, lightweight range of blocks for use on dayboats and cruising yachts. Ideal for mainsheet, vang tackles, lead blocks or wherever a powerful and compact purchase tackle is required.

With our unique super-low friction ball race systems, featuring acetal sheaves and delrin ball bearings, running on a large diameter centre boss. This allows us to fit more load-bearing balls, which ensure extremely low friction performance, even under high loads.
 
Length mm: 105
 
Weight (g): 231
 
Single 58mm x 17mm (2 1 /4 x 5/8")
 
Fiddle 32/58mm x 17mm (1 1 /14 x 2 1/4" x 5/8")
 
Max rope diameter 12mm ( 7 /16")
 
SWL 630Kg (1385 lbs)
 
Break load 1260Kg (2770 lbs)