This drain pipe vent cap is designed for use in drain, waste, and vent (DWV) pipe systems, with a socket end for connecting unthreaded vent pipes. Suitable for household and industrial purposes.Specification:Color: White;Material: PVC;Size: 52 x 50mm / 2.05 x 1.97 inch (Dia*H);Inner Diameter: 50mm / 1.97 inch;Packing List: 4 x PVC Drain Pipe Vent CapAdvantage:Made of quality PVC material, high hardness, lightweight, impact resistance, and aging resistance, can be used for a long time;Fine craftsmanship, professional design, compact structure, no dirt, no water leakage; Crack resistance, pressure resistance, corrosion resistance;It has a wide range of uses and can also be used to prevent birds and other creatures from falling into chimneys, vents, and sewers, effectively avoiding pipe blockages.