Perfect Pet VIP Vinyl Patio Doors - VIP Vinyl Pet Door and Patio Dog Doors from PETCOPerfect Pet VIP Vinyl Patio Doors are the first patio dog doors specifically designed to fit all ""Vinyl"" tracks used in most newer or remodeled homes. The VIP Vinyl Pet Door features ""Low E"" dual pane tempered glass and the patented ""multi-flex"" flap.Fit Tip: Be sure to choose the correct size Perfect Pet VIP Vinyl Pet Door for your pet, by selecting the flap size that will allow them to comfortably pass through the patio dog doors, without bowing or scraping their backs. Also select the proper ""inside track"" size of your patio door. Specially designed VIP Vinyl Pet Door to fit your vinyl sliding patio door. Double pane ""Low E"" tempered glass. Patio Dog Doors fit most existing sliding door locks. Fits 1-1/2"" to 1-3/4"" thick doors. Extremely energy efficient. Size: X-Large.