1、Superior Material: This kayak pulley block is made of robust nylon material. It can withstand strong tension, is highly wear resistant, and does not easily age or damage even after long term use, reducing frequent replacement. 2、Perfect Replacement: Serving as an ideal and direct replacement for old or damaged kayak pulleys, this pulley block is dependable and built to last, providing a hassle free use experience. 3、Smooth Operation: The sheave spin bearing of this kayak pulley block is designed with minimal friction, ensuring smooth operation when the rope is in use. It provides seamless and efficient usability. 4、Versatile Use: This pulley block sheave supports a maximum rope width of 9mm, ensuring a wide range of applications. Whether you're kayaking or doing other rope related activities, it offers ample versatility. 5、Long Lasting Durability: Pulley block represents a long term investment in your kayaking equipment. The quality design and construction mean that it withstands the rigors of regular use and outdoor elements. Item Type: Sailboat Pulley Blocks Material: Nylon Size: Approx. 54mm / 2.13in Length, 17mm / 0.67in Height, 4.5mm / 0.18in Mount Hole Diameter, Hole Diameter at Both Ends 30mm / 1.18in, Rope Maximum Diameter 9mm / 0.35in Application: Sailboat, Kayak, Canoe 2 x Nylon Sailing Pulleys