9mm Screw Closures
9mm Screw Closures is a very popular product of Aijiren, because its matching 9mm hplc vial is often used in autosamplers, the most common type of product, so the sales are very high, and the sales of the matching 9mm closures are also very high. The 9mm screw neck cap is made of high-quality polypropylene. Septa is compounded with silicone and PTFE. PTFE is extremely inert and suitable to be placed on the side facing the sample. The hardness and non-deformation of silicone ensure that the septa is automatically injected by the needle. After the puncture, the air pressure can be restored to ensure air tightness.