1, Sleeve with oval shape and black color. 2,Each and every pcs was tested at 10kgs/cm2. 3,Inner seal can bear 75 degree.

1, Sleeve with oval shape and black color.

2, Each and every pcs was tested at 10kgs/cm2.

3,Chipware is zinc.

4,Inner seal can bear 75 degree

5,The snap spring is stainless steel with heat treatment and the life time is more than 1000 times.