Made of high-quality plastic material, process high durability, wear resistance, smooth enough, prevent the vacuum from scratching the floor, dirt-, quiet wheels, no noisy. NV350 replacement wheel compatible with Navigator, Rotator vacuums models NV350 series, NV400 series and NV500 series. Replacement wheels compatible with models NV22, NV42, NV105, NV80, NV341, NV350, NV351, NV352, NV355, NV356e, NV360, NV370, NV400, NV401, NV402, NV420, NV450, NV480, UV410, UV490CCO, NV500, NV501, NV502. Use a flat screwdriver to push the old wheel upwards, and then install the new wheels in the groove.(Please Note: These are the smaller front wheels, not the larger back wheels.)