Smartide Filter for Shark Navigator Lift-away Nv350, Nv351, Nv352, Nv355, Nv356, Nv356e, Nv357; Part# Xhf350 Replacement Replacement filter for Shark Navigator Lift-away Nv350, Nv351, Nv352, Nv355, Nv356, Nv356e, Nv357 Made of high-strength and environmental protection material Designed to meet or exceed the original qualitity Absolutely Essential for Allergy Sufferers! Traps 99.9 of airborne particles Shipping with high strength safeguard protected box, prevent bending and compressing.