3Pcs Block Universal Head Stainless Steel 304 Lifting Crane Pulley For Home Garden Yard M15 Designed for use with rope or cord in indoor and outdoor applications Material : stainless steel. Anti-rust and more durable. Bear Load :35kg/ 77.1Lbs For Rope Dia. : 6mm/ 0.24"; Hook Dia : 11mm/ 0.43" The length: 62mm(2.44"), Pulley Dia 15mm /0.59"