Descriptions:

1.The glass barrel is made of I-glass borosilicate glass.

2.Needle shield and rubber stopper is made of 6422GS 6D Chlorinated butyl rubber 6422GS

3.The needle is stainless steel 304,and the plunger rod is made of PS.

4.Silicon oil is as a lubricant to be added to the inwall of glass barrel.