Schaefer Single Alum. Ball Bearing Block w/Swivel Shackle, Max Line 7/16" Wichard Hardware Can be installed on any

Can be installed on any inclination or position : vertical

Heavy-duty zippers on both sides of the mast allow easy on and off

Ronstan Series 14 Plastic End Stop

Radii R (in)- 2 11/16

Schaefer Single Alum. Ball Bearing Block w/Swivel Shackle, Max Line 7/16" Wichard Hardware Can be installed on anyProduct Description Schaefer Single Alum. Ball Bearing Block w Swivel Shackle, Max Line 7 16" Single block with aluminum cheeks and ball bearing sheave. Delrin(tm) ball bearing sheave ensures low friction operation. For boats to 25', control lines on boats to 30'. Specifications: Sheave Dia.: 1 7 16 in. (37 mm) Thickness: 3 4 in. (19 mm) Width: 1 9 16 in. (40 mm) Length: 3 25 32 in. (96 mm) SWL: 1000 lbs. (410 kg) Weight: 2. 4 oz. (68 g) Max Line: 7