2 rollers supplied (1 top and 1 bottom). Bottom rollers are spring loaded. E - Distance between centre of fixing hole to edge of glass: 18.5mm. Will fit both straight and curved shower enclosures.
The Set of 2 Shower Door Rollers/Runners/Wheels with a diameter of 23mm, specifically the L105 model, would be the ideal choice for those looking to upgrade their shower enclosures.