The wooden pet door 25.5cm x 24.5cm x 5.2cm is suitable for pets weighing up to 7 kg. Recessed adapters and extension channels are available separately. Easy to install: suitable for most wood and PVC doors. Metal, glass, brick doors and walls require additional hardware (sold separately). Features: Ready to install on wooden doors. High performance ABS door frame combined with PC door frame for durability. Easy and practical installation thanks to the cut-out version. Four shapes to fit your cat's daily routine Instructions for use. Pictures are taken in kind, due to different monitors and lighting. shooting, environmental factors, etc., there is a little color difference is objective and unavoidable. The color difference is not a quality problem