characteristic:
Outer ring thread, multi-level line contact, strengthen to prevent external leakage, more convenient loading and unloading;
Built-in three lips to strengthen the prevention of internal leakage;
Automatic demoulding design to enhance service life;
The multi-layered skeleton design enhances pressure resistance and challenges 10 kg of fluid impact;
For the medium is dirty, strengthen the solid body to prevent the main lip from being damaged.