The Black Diamond Pulley is strong and light — it weighs only 2.7 ounces and works well for big wall hauling and emergency situations requiring rescue. The frame is made of tough heat-treated aluminum alloy. The nylon wheel rotates on a self-lubricating, oil filled bronze bearing, providing smooth action and durability. Features: Super light and durable Works well for big wall hauling and rescue work Self-lubricating smooth action Specs: Weight: 76 grams (2.7 oz)