8 x Twin Bottom Top Shower Door Rollers Pulleys Wheels Runners Bathroom Double Wheel Features: . Designed for use on 5mm or 6mm glass doors. Easy glide rollers and easy clean. Wear resistant wheels feature smooth, low noise sliding. The shower door rollers set include 4 upper rollers and 4 bottom rollers. Made of plastic, nylon, 304 stainless steel and other material, not easy to rust. Perfect for most shower enclosures, shower cabins and steam cabin enclosures. Specification: Condiiton: Color: As picture shown Type: Single wheel / Double wheel (Optional) Material: Body: Nylon, Shaft: Aluminum, Wheels: Polyacetal, Others: Stainless Steel Screws Minimum Hole size in the glass: 10mm (can fit 10mm - 12mm) Fix the center of the screw to the end of the roller: 18mm Wheel Size: (Dia.) x (H) 25 x 5 mm / 0.98" x 1.97" (appr.) Door Roller Size: (L) x (W) 55 x 43 mm / 2.17" x 1.69"(appr.) Package Included: 8 x Shower Door Rollers (4 upper rollers and 4 bottom rollers with the screw and cover caps) Notice: Please allow 1-3cm error due to manual measurement and make sure you do not mind before ordering. Please understand that colors may exist chromatic aberration as the different placement of pictures.