Features: brand new and high quality Offset holes through and washers to allow height adjustment Mainly usded in bathroon shower door show pulley Specification: Material: ABS Color: White Outer Diameter: 23mm/0.91" Inner Diameter: 5mm/0.2" Wheel Width: 5.7mm/0.22" Quantity: 8 Pcs/1 Set Note: Please allow 1-3mm error due to manual measurement. pls make sure you do not mind before you bid Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package Includes: 8 x Replacement Shower Door Rollers