Two-part folding skirt stoppers are designed to keep your contents secure two ways. The lower section is molded to grip the outside of the container and the upper hollow plug features annular serrations to provide a tight seal at the rim. Ideal for securing glass, metal, and plastic containers regardless of type. Upper hollow plug section can be perforated to exact contents without removing the stopper — remains watertight even after several perforations.
The rubber stoppers are ideal for chemical transfer and withstand temperatures from -4°F (-20°C) to 212°F (100°C). Chemical-resistent silicone stoppers are recommended for biological applications and withstand temperatures from -76°F (-60°C) to 428°F (220°C)