All-weather energy efficient dog door, made from efficient structural foam molded plastic. Adjustable frame telescopes 3/4" to 1-3/4" thickness. Nylon for draft restrictor. Double vinyl flap design creates energy efficient air pocket of up to 3" between the 2 flaps for maximum insulation. Wall kit available Drop Shipment only. No. RWS: Thickness: 3/4" to 1-3/4", Flap Dimension: 5″ × 9-1/4", Cut-Out Dimension: 6-1/2″ × 11-1/4", Dog Size: Small, Material: Foam molded plastic No. RWM: Thickness: 3/4" to 1-3/4", Flap Dimension: 7-1/4″ × 13″, Cut-Out Dimension: 8-1/4″ × 14-7/8", Dog Size: Medium, Material: Foam molded plastic No. RWXL: Thickness: 3/4" to 1-3/4", Flap Dimension: 9-3/4″ × 17″, Cut-Out Dimension: 11-1/8″ × 19-1/8", Dog Size: Extra Large, Material: Foam molded plastic