Rolltrak Fly screen Nylon Replacement Roller 24mm SKU: 210394 MODEL: R4250 Error. try again later You've successfully joined the club $ 7 .76 each Mitre 10 SAvailable at selected stores. Check your local store for details Variants Bearing acetal grooved roller with plastic axle. Features and benefits Diameter: 24mm. Plastic Axle: 5mm. Load: 12kg each roller.