Features High-quality stainless steel material, stable performance, not easy to rust and good air tightness. This is an air check valve with hexagonal female thread, which is easy to install and remove and can be used for water connection. Suitable for connecting pipes under gas, water, oil and other media. Accuracy BSPP female thread, easy to connect without slipping. Available in 4 styles to choose from: 1/8", 1/4", 3/8", 1/2". Specification: Condition: 100% Brand New Material: 304 stainless steel. Thread: BSPP female thread. Optional style: 1/8 inch, 1/4 inch, 3/8 inch, 1/2 inch Features: 1. Suitable for connecting pipes under gas, water, oil and other media 2. Accuracy BSPP female thread, easy to connect without slipping 3. Available in 4 styles to choose from: 1/8", 1/4", 3/8", 1/2" 4. This is an air check valve with hex female thread, which is easy to install and remove and can be used for water connection 5. High-quality stainless steel material, stable performance, not easy to rust and good air tightness. Package list: 1 x air check valve Package List