Feature:
Made with high quality new materials
Healthy and environmentally friendly, non-toxic and tasteless
Application:it can be used in household drinking water, aquarium, air pump, laboratory
Working Temperature:-40℃-200℃
E.g：
2x4mm,it mean inneer diameter 2mm,and outer diameter 4mm;
3x5mm,it mean inneer diameter 3mm,and outer diameter 5mm;
3x6mm,it mean inneer diameter 3mm,and outer diameter 6mm;
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