Solid plug stoppers are designed for sealing column ends.
Plug stoppers feature a "back seal," meaning the O-Ring on the Ace-Thred connection is located at the top of the threads.
They allow for the preparation and storage of columns. Each stopper is supplied with either one FETFE O-Ring or one Silicone O-Ring. Available in Nylon or PTFE construction, with the exception of item 89052-812, which is fabricated from Ultra High Molecular Weight Polyethylene (UHMWPE).