McKissick Utility Crane Block, Mediumweight, Series: 380, 3/4 in, 7/8 in, 1 in, 1-1/8 in Maximum Cable, 35 ton, 20 in Sheave Outside Dia, Roller Bearing, Roll Forged Sheave, 3 Grooves, 48.75 in L x 24.75 in W x 14.41 in THK