Feature 1[4 INCH VENT HOSE] This flexible vent hose is designed for ventilation applications, usually used for heating, ventilation, and air conditioning (HVAC) systems. 2[4 LAYER PROTECTION] This hose features a four layer protection design that is more sturdy and less likely to leakage than single layer designs. 3[ALUMINUM FOIL INNER LAYER] The inner layer is made of flame retardant and heavy duty double aluminum foil material that provides reliable performance. 4[DUAL PVC OUTER LAYER] The grey dual PVC thermoplastic outer layer preserves the aluminum from cuts and tears while preventing leakage. 5[EASY TO INSTALL AND CUT] Two clamps make installation easy, and the ventilation hose can be cut with wire cutters to any length you need.Item Type: Vent HoseMaterial: Aluminum Foil, Steel Wire, PVCSpecification: 4 Inch .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List1 x Vent Hose2 x Clamp