Features:OOTDTY The are made from nylon, and the center bearing is product of solid-copper. Fully enclosed bearing, water-resistant and dust-proof, solid load-bearing.Suitable Glass Thickness: 4-6mm/0.16-0.24inch.Easy to install and maintenance.They adjust-able up and right down to enable the door to be covered as much as mate with the frames.When you slide the door, there isn't any noise and slide smoothly.Suitable for Most Shower Enclosures, Shower Cabins Enclosures.Specifications:Material: NylonWheel Diameter: 27mm (1.06inch)/25mm (0.98inch)/23mm (0.90inch)/20mm (0.79inch)Suitable Glass Thickness: 4-6mm/0.16-0.24inchSuitable Opening Size of Glass Door: 10-12mm/0.39-0.47inchPackage Includes:1x PulleyNote:Notes:Please allow 1-2cm mistakes due to handbook measurement, just be sure you don't intellect earlier than you order. Due to the adaptation between diverse monitors, the image might not reflect the particular shade of the item.