The JET Tools SUW-133104 is a single 4" sheave made from cast iron, with bronze bushings and a ball type oiler. Testing is performed at 150% of rated capacity. This sheave is not intended to replace sheaves in either snatch blocks or yarding blocks, so that restriction should be considered when selecting a component for a block assembly.

• Single sheave measuring 4"
• Cast iron construction with bronze bushings
• Equipped with a ball type oiler
• Tested at 150% of its rated capacity
• Excluded from replacement use in snatch blocks and yarding blocks