Rolltrak Shower Replacement Roller 19.2mm SKU: 210398 MODEL: R4300 Error. try again later You've successfully joined the club $ 11 .98 pack of 2 Mitre 10 SAvailable at selected stores. Check your local store for details Variants Bearing acetal flat roller and metal axle. Features and benefits Diameter: 19.2mm. Load: 8kg each roller. Metal Axle. Threaded metal hub. Suits shower screen/fly door.