Rolltrak Window Replacement Roller 16mm SKU: 210392 MODEL: R4190 Error. try again later You've successfully joined the club $ 18 .76 each Mitre 10 SAvailable at selected stores. Check your local store for details Variants Bearing acetal grooved roller. Features and benefits Diameter: 16mm. Axle: 3.2mm. Tyre width: 4.6mm. Load: 12kg per roller.