1、Lockable: With switch, easy to control your cats in and out. 2、Safe: Transparent flap lets pet cat see through the door. Inner frame edge is smooth so as not to hurt pet. 3、Easy To Install: Comes with hardware to make you easily install it in doors. 4、Excellent Quality: Made of ABS and acrylic, sturdy and weather‑resistant, durable for years of use. 5、Large Size: Inner size is about 23x20cm(9*8inch), suitable for meduium size cats(weight under 12.5kg and waist grith under 75cm). Features: Lockable: With switch, easy to control your cats in and out. Safe: Transparent flap lets pet cats see through the door. Inner frame edge is smooth so as not to hurt pet. Easy To Install: Comes with hardware to make you easily install it in doors. Excellent Quality: Made of ABS and acrylic, sturdy and weather-resistant, durable for years of use. Large Size: Inner size is about 23x20cm(9*8inch), suitable for meduium size cats(weight under 12.5kg and waist grith under 75cm). Specification: Material: ABS+Acrylic Color: White, Brown, Black Size: Inner: Approx. 23 x 20cm / 9 x 8inch Outer: Approx. 28 x 25 x 2.4cm / 11 x 10 x 1inch Fitment: for medium pet cats (weight under 12.5kg and waist grith under 75cm) Package list: 1 x Pet door 8 x Screw Cap4 x Screw 4 x Nuts 4 x Double Sided Adhesive Tape 1 x Manual 1 x Pet door 8 x Screw Cap4 x Screw 4 x Nuts 4 x Double Sided Adhesive Tape 1 x Manual