Features:*Made of nice material, durable and reasonable to use*These rollers match glass bathe doors.*Top rollers are top adjustable to allow the door to be coated up to mate with the frame or magnetic seal the place you have a couple of doors.*Bottom rollers are spring loaded.Specifications:Diameter of wheels: 23mm.Width of wheels: 5mm.Materials:Chromed plastic body, 304 stainless steel micro-bearings, nylon wheels, zinc alloy.Package Contents:4x Shower door pulley (2 peak and 2 bottom rollers)4x Anti-collision Slice4x ScrewsNote: 1. The real color of the item could also be slightly varied from the pictures proven on web content brought on by many factors resembling brightness of your monitor and light-weight brightness2. Please allow slight handbook dimension deviation for the data.