Feature: *Dual bearings for smooth rotation: The idler wheel is equipped with two small ball bearings to for ensure smooth rotation and reduce friction. *High quality galvanized steel:Made from and corrosion-resistant galvanized steel, these pulleys are built to last. Burr-free protects the rope and your hands. *Multifunctional design:These pulleys have small pulley diameters of 30mm, 50mm, 60mm, 80mm, 95mm and a maximum groove width of 15mm, suitable for ropes from 1-8mm. They have a maximum load of 200kg and a safe load of 50kg. *Multiple uses:These pulleys are great for guiding ropes, lifting objects, operating winches, and even light sliding doors. Their versatility makes them a valuable addition to any tool kit. *Multiple Size Pulleys: 5 sizes of pulleys are available, providing ample options for your various projects and needs. Specification: Product name: Heavy duty track pulley Product material: steel Scope of application: used for sliding doors, door and casement tracks, track machinery accessories, . Product type: V type Frame thickness: 2.5mm Pulley diameter: 30mm, 50mm, 60mm, 80mm, 95mm Applicable rope: 1-8 mm Safe load: 50kg Maximum load: 200kg Packing list: 1*Pulley Note: 1. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 2. Please allow slight manual measurement deviation for the data.