1.The door can be opened inside and outside. 2.Inverted T shape floor with flat anti-slide surface outside£¬and with high strength. 3.Equipped with protect grid and buzzer & warning light at front. 4.Foaming system widely using Cyclopentane which is more environmental. 5.Optional accessories£ºDoor curtain, inside lamp, ramp and other specified parts. 20'x8'x8'6''.