Flange caps are designed to seal the large open end of a cartridge or syringe, ensuring the plunger or piston (respectively) is contained and that contaminants do not come in contact with material during storage and shipment. Hybrid flange caps for syringes specifically, have a special tamper evident feature. In order to remove the cap, the user must detach the safety seal, which is then used as a pull ring to remove the cap, clearly identifying if the product has been opened.
 |