Model 308 is a sliding door cage for average dogs and similar size animals. One entire end of this cage is a sliding door designed for easy transfer from live traps. This transfer cage matches up nicely with the rear sliding door on our 15W x 20H" trap model 609.5. This cage measures 30L x 16W x 20H" and is constructed of 1 x 2" - 12 gauge wire mesh. This cage has a sheet metal tray bottom for animal feet comfort and it is removable for easy cleaning.