McKissick Utility Crane Block, Lightweight, Series: 380, 3/4 in, 7/8 in, 1 in, 1-1/8 in Maximum Cable, 70 ton, 20 in Sheave Outside Dia, Roller Bearing, Roll Forged Sheave, 5 Grooves, 65.94 in L x 24.75 in W x 18.25 in THK