Ball Casters
Diameter19 20 23 25 27mm Shower Door Rollers Runners Wheels Shower Room Pulley Replacement 4top +4bottom 8pcs
Pulley diameter: 20/23/25/27MM

Set of 8 Pcs Single Shower Door Rollers (4 upper rollers and 4 bottom rollers).
Diameter of the wheel: 20/23/25/27mm; Width of the wheel: 6mm. Minimum Hole size in the glass: 12-14mm. Maximum glass thickness: 4-6mm.
Material: Plastic, Nylon, A Plastic, Nylon BS and stainless steel.
Comes with screw cover caps. Spring loaded action can also fit curved showers. Designed with a nut and a plastic cover.

As shown in Figure: