Wide Compatibility: Customized-designed compatible with Navigator, Rotator vacuums models NV350 series, NV400 series and NV500 series 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. Premium Quality: Made of high-quality PE material, enough to last a and smooth enough to not damage floors. Easy to install: Push down the older wheels with a flat head screwdriver, install the new wheels. Effective cleaning: Suggests checking the wheels regularly, replace the worn wheels, to help maintain your vacuum cleaning performance. (Note: These are the smaller front wheels, not the larger back wheels. Please read the description carefully before ordering.) Colour: black and gray Material: PE Size: 1.3x1.8cm Package Contents: 2 pairs * wheels Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.