Features: The wheels are made of nylon with strong load bearing capacity. Suitable for home bathroom applications. The pulley is adjustable. Use a screwdriver to turn the screw clockwise or counterclockwise to adjust the glass size. Ideal for use in shower rooms, partition sliding doors, and sliding doors. Provides smooth, quiet sliding operation. Easy to install and maintain. Specifications: Material: Nylon Style: Silver wheel upper wheel, silver wheel lower wheel, gray wheel upper wheel, gray wheel lower wheel Wheel diameter: 23mm (0.90 inch), 25mm (0.98 inch) Note: Please allow 1-2 cm errors due to manual measurement. Check that you are comfortable with this before ordering. Due to differences between monitor displays, the image may not reflect the actual color of the item. Package includes: 1 x Pulley