IF YOU WOULD LIKE TO RETURN YOUR ORDER, PLEASE CONTACT US FIRST.1 Bottom double roller supplied.100% new and high quality.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.Bottom rollers are spring loaded.Will fit both straight and curved shower enclosures.Matching top roller available.Compatible with Roman, Mira, Instinct and other showers.Specifications:Wheel Diameter: 23mm.Wheel thickness: 6mm.Diameter of hole in glass: 10mm.Glass thickness: 6mm.Distance between centre of fixing hole to edge of 17.8mm.Distance from face of glass to the wheel: 23mmOTHER MATCHING PRODUCTS:-Top Roller Available - https://www.diy.com/departments/1-x-shower-part-shower-door-top-rollers-runners-replacements-spares-wheels-23mm-wheel-diameter-r4/5060626640665_BQ.prdPostage to UK and worldwide.If you still cannot find the part you are looking for or need to ask any additional questions please contact us.