All-rubber structure corrosion resistance long service life good effect And provide a tight seal prevent backflow maintenance-free. When installing the check valve special attention should be paid to the direction of flow of the medium and the normal flow direction of the medium should be consistent with the direction of the arrow indicated on the valve body otherwise the normal flow of the medium will be cut off, good sealing Easy to install Silicone Duckbill Valve Made from Environmentally friendly silicone material; Specifications Outer diameter 32* inner diameter 16* height 38mm Package Contents: 2 x Duckbill Check Valve |