The perfect solution for patio doors. Easy No-Cut Installation. Adjustable Height 77-3/4" to 82-1/2". 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. 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