this is a set of four twin wheeled 24.5 mm wheel heavy duty height adjustable shower door quadrant roller units to suit a fitting hole size of 8.00mm .
sold as a set of four
these are also available in ones and twos in the shop page called singles and pairs
22.6mm twin wheel chrome plated twin fittment quaddrant rollers , distance between fitting hole centres 26.00mm . and 10.00mm fitting hole diameter if you have 8.00mm fitting holes in your door please contact us sold as a set of four upper units