The perfect solution for patio doors. Easy No-Cut Installation. The Large Tall has the same opening as our Large door (10" x 15"), but designed with a 9" rise (location of bottom of opening from the floor) to accommodate taller breeds. Adjustable Height 77-3/4" to 82-1/2". Spring tension top section allows door to be installed without any cutting. Heavy aluminum construction. Installation video included. Patented Two-Way, soft, flexible translucent vinyl flap. Tempered safety glass. Locks Left or Right. Weather stripping included. Metal Close out panel can be inserted on either side. Exclusive Lifetime Warranty