NV350 replacement wheel compatible with Navigator, Rotator vacuums models NV350 series, NV400 series and NV500 series. Replacement wheels well matched with units NV22, NV42, NV105, NV80, NV341, NV350, NV351, NV352, NV355, NV356e, NV360, NV370, NV400, NV401, NV402, NV420, NV450, NV480, UV410, UV490CCO, NV500, NV501, NV502. Made of nice plastic material, activity high durability, wear resistance, enough, quit the vacuum from scratching the floor, dirt-resistant, quiet wheels, no noisy. Use a flat head screwdriver to push the former wheel upwards, and then establish the recent wheels in the groove.(Please Note: These are the smaller entrance wheels, no longer the larger back wheels.) size:12 x 7 Material:plastic colour:gray Package Contents: 6 x Front Wheels Only the above equipment content, diversified products are not included. Note: Light and assorted exhibits can cause the colour of the item in the photo a bit of assorted from the genuine thing. The size allowed error is +/- 1-3cm.