The dual nylon double pulley with a swivel bearing is an essential accessory for sailboats and marine vessels. Made from nylon and stainless steel, this pulley block ensures durability and resistance to harsh marine environments. Ideal for adjusting , it allows smooth and efficient rope handling, making it a must-have for any sailing enthusiast. Features -Color:Black -Material:Nylon, Stainless Steel -Size:9.70X5.20X2.20cm/3.81X2.04X0.86in -Durability: ensures longterm use without significant wear, making it a reliable choice for various marine applications -Smooth rotation: double pulley swivel bearing design allows for effortless and smooth rotation, enhancing operational efficiency -Versatility: suitable for pilates, sailboats, and other types of vessels, offering wide ranging applications in marine environments -Easy installation: simple to install, saving , and providing a easy setup experience -Efficiency: enhances vessel performance by reducing friction resistance, thereby increasing sailing speed and overall efficiency Package list: 2 x Nylon Pulley Block