1. aftermarket/replacement Boat Pulley Block.Made of stainless steel and nylon material, anti- and rust-proof, strong and . 2. -Exceptionally high working loads.Nylon pulleys have low friction coefficient, high impact resistance, resistance, and aging resistance. 3. -Low maintenance, long service life.360 degree rotation prevents rope/cable/line knots, easy to use 4. Equipped with bearings inside, smooth rotation. 5. The spring has strong resilience, close bite, and fix the camel's back, strong and . 6. Light weight, easy to install at high altitude. 7. Suitable for fitness equipment, rigging for yachts, sailing ships, etc. Product Name: Universal Head Single Pulley Maximum load: 600kg (1500lbs) Colour:Black+Silver Material:Stainless steel + nylon Package Contents: 2 x Universal Single Pulley Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.