Guardian Gear ProSelect Empire Dog Cage 20-Gauge Steel Cage  This ProSelect Empire dog cage is extremely strong with reinforced 0.5-inch diameter steel tubes and 20-gauge steel Medium-Sized Cage  This cage features interior dimensions of 35.75 inches x 23.5 inches with 24.5 inches of height; a large sized cage is available too Floor Grate With Tray  Cleanup is easy with this ProSelect dog cage because of its grated floor with tray Removable Casters  You can attach casters to the bottom of the cage to allow for easily rolling the cage to other locations or leave the casters off for added stability Durable Dog Cage  The Empire cage will stand up to the toughest abuse from the largest dogs with strong latches and thick steel construction