Item 1 is the body of the oconnector, the material is POM;
Item 2 is the collect of the oconnector, the material is POM with stainless steel(ST) teeth;
Item 3 is the cap of the oconnector, the material is POM;
Item 4 is the Double O'Ring of the oconnector, the material is NBR;
POM: Highly durable and resistant to fatigue and creep. It has high resistance to a wide range of organic & inorganic chemicals and detergents. Not recommended for use with strong acids or repeated exposure to strong oxidize.
STTeeth: 304 stainless steel , It has good corrosion resistance, heat resistance, low temperature strength and mechanical properties, and durable.
NBR: Good oil resistance, high wear resistance, good heat resistance, strong adhesion.