Wire blocks are lightweight, low friction blocks designed to carry wire halyards and control lines on boats of all sizes. To minimize friction from twisting or unfair leads, 1.50 inch and 2.00 inch wire blocks feature sideload balls between the sheave and the sideplate. Hi-load composite bearings carry axial loads. Stainless steel sideplates offer superb chafe resistance. 5/8 in WIRE, 3/16 LINE MWL 1500#, BS 3000# WT. 23/4OZ SHEAVE 11/2".