Size and material - the pet cage bowl is made of a stainless steel inner bowl and an environmentally friendly PP outer bowl.2 in 1 hanging dog bowl - dog bowl for crate including a removable stainless steel inner bowl and a fixed plastic bowl, use it as a basic bowl in daily use and also can separate them into two bowls ifneed.Easy to use - the dog crate bowl prevents the pet threw food or water, the stainless steel bowl is removable, it is easy to remove it to wash and keep clean, you can dothe plastic bowl attached to the cage and just remove only the stainless steel bowl.Easy to install - loosen the white nut of the pet bowl and put the plastic screw part into the gap between two iron wires of your dog crate, tighten the white nut, then finished.Package includes - a small plastic outer bowl, come with a stainless steel bowl and a white lock.