Lightweight pet kennel made with heavy-duty plastic Easy-to-assemble; it has never been assembled before so easy to carry home Wire door secures shut with chrome squeeze door latch,easy to operate Meets airline requirements; tie-down holes on all 4 corners; Four way ventilation I think it's suitable for 30-50 LBS, could be more Generally speaking there are only 3 suitable sizes of pet kennels, which are approved by international airlines; this is the medium size out the three.