Any gap that causes a draft between sliding glass doors decreases energy efficiency and lets in cold air. This sliding door draft stopper is designed to eliminate drafts and block out the cold or heat. Keep your room temperature stable with this weather stripping for sliding doors. Available in black or white to accommodate differing door colors, the draft stopper is easily installed using the adhesive backing. Although the draft stopper and foam weather stripping are included with the Quick Panel, Thermo Panel 2e Microchip, and 3e Thermo Panel patio doors, the draft stopper works with any brand of panel pet doors for an airtight seal, including the Endura Flap vinyl sliding door dog door insert. The adhesive is 1/2" wide and begins inset at 1/8" with an overall width of 1 7/8". The draft stopper is trim to fit, and you can choose lengths of 81" or 96", depending on your door height. If your door is higher than 96", purchase another 81" draft stopper and trim to the accurate size.