Feature: 1. Excellent Sealing: This valve is well sealed with excellent craftsmanship, which aims to reduce leakage and make the process of exhausting more stable. 2. High Flowing Rate: The valve body is designed with pneumatic direct flowing channel, with large inlet and export size and high flowing rate, so that you can have a great experience of using it. 3. PP Material: Our valve is made of PP material, which is strong and durable, and can be applied for a long term under normal operation and use. 4. Easy to Install: This valve is very easy to install, with G1 lower male thread and G1/2 upper female diameter, light weight and very friendly to novices. 5. Applicable Scenarios: Our valve is suitable for use in residential, residential and office buildings as well as some industrial systems and is very versatile. Specification: Item Type: Automatic Air Vent Valve Material: PP Size: Approx. 20 x 8.5 x 8.5cm / 7.87 x 3.35 x 3.35in Weight: Approx. 313-327g/11-11.5oz Bottom Port External Thread: G1 Top Port Inner Diameter: G1/2 Use: Inlet and exhaust valve. Package List: 1 x Automatic Air Vent Valve1 x Washer1 x White Inner Liner1 x Accessory