... mini check valve 2)unique polishing surface 3)easy&quick to load, unload, revolve 4)long term stable ... POM FM090, imported from TaiwanGasketNitrile rubber in quick connector (under claw), and silicon rubber in female threadplace of originFuzhou, ... gardening irrigation system,hydraulic pneumatic equipment etc.Characteristiceasy and quick to load, unload and revolve, never to leak for many yearsweight800g ...