3 series Ball Bearing Cheek block with anodized aluminum cheek. Delrin(tm) ball bearing block is perfect for control lines under consistent. adjustment. Stainless Steel base provides a strong platform. Sheave Dia. 1-7/16" (37 mm), Max Line 7/16" (11 m), Length 2-7/8" (73 mm), Width 1-3/4" (44 mm), Height 3/4" (19 mm), Fasteners (4) #10 RH (5 mm), C/C 2-3/8" (60 mm), SWL 1000 lbs. (450 kg), Weight Alum. 2.5 oz. (71 g)