The HVAC Industry has a new improved choice when it comes to tubing protection. StockCap now provides two styles of Rubber Seal Plugs sized to fit standard copper tube dimensions. The press fit feature makes the insertion of the plug into the tube easy, and the self-sealing material allows for the injection of gas into the plugged tube, keeping it clean and dry during shipment and storage. These plugs protect and seal tubing used in various applications including HVAC components and tubing for medical use. A variety of sizes in varying lengths and diameters are available. Black is the standard color or choose from a variety of custom colors!