9mm Short Thread Closures
Vertical lines are evenly distributed on the outside of 9mm screw closures. This is to prevent users from slipping and unable to achieve the seal during the sealing process. The vertical lines increase the friction and facilitate the use of force. Aijiren uses fully automated machines to produce 9mm screw closures, achieving the same quality between batches, and customers can purchase different types of 9mm screw closures according to their own experimental needs, including but not limited to color, septa type.