Features: Designed for use on 5mm or 6mm glass doors. Made of plastic, nylon, 304 stainless steel, anti-rust and reliable. Wear resistant wheels feature smooth and low noise sliding. Suitable for most shower rooms, showers and steam cabin enclosures. The shower door rollers set include 4 bottom rollers. Specification:Condition: 100% Brand NewColor: As picture shown Material: Plastic+Nylon+304 stainless steel Type: Single wheel / Double wheel (Optional) Minimum hole size in the glass: 10-10.5mm (can fit 10mm - 12mm)Fix the center of the screw to the end of the roller: 18mmRoller size(Dia*W): approx.25*5mm / 0.98*0.2inPackage Included:4* Bottom Rollers 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.