Ideal Pet Products - VPP Vinyl Pet Patio Door - Medium/76 3/4 to 78 1/2 Inches - IPP-80VPPMW Comes with a rigid lock-out panel that slides into grooves on the inside of the frame and snaps into place to effectively lock the door. Flap size of 7" wide x 11-1/4" tall. Ideal for pets weighing up to 90 lbs. and up to 10 in. wide. Vinyl pet patio doors will not fit correctly with aluminum sliding configurations - vinyl and aluminum are not interchangeable. Adjustable to fit existing vinyl sliding door heights of 76-3/4" to 78-1/2". Unit is comprised of a white vinyl-framed safety glass panel mounted above a plastic framed pet door. Panel can be installed in either a right or left hand sliding door opening. Flexible vinyl flap is clear to allow pet to see through opening and non-toxic for added safety. Quick and easy installation with simple step-by-step instructions.