2 x Twin Top Zinc Alloy Shower Door Rollers/Runners/Spares 20mm Wheel Diameter L090 Hole Size in Glass_5mm They have a white plastic

They have a white plastic push on cap on the back to finish them off

Shower Door Guides

F  - Distance from the face of the glass to the wheel: 17

1 or 2 wheeled version

F  -  Distance from the face of the glass to the wheel: L077-1 is 17mm and L077-2 is 18

2 x Twin Top Zinc Alloy Shower Door Rollers/Runners/Spares 20mm Wheel Diameter L090 Hole Size in Glass_5mm They have a white plasticTwin Double Zinc Alloy Shower Door Top Rollers Description: 2 top rollers supplied. 100% new and high quality. Suitable for sliding shower doors. The truck is held in place with a nut and this is covered with a chromed plastic cover making them pleasing to the eye and easy to clean. They are adjustable up and down to allow the door to be lined up to mate with the frame or magnetic seal where you have a pair of doors. Swivel action to also fit curved