1. Replacement Boat Pulley Block.Made of 304 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, strong and . Product Name: Universal Head Single Pulley Light weight, easy to install at high altitude. Suitable for fitness equipment, rigging for yachts, sailing ships, etc. Colour:Black Material:Nylon + 304 stainless steel Package Contents: 1x Universal Head 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.