S shape of a right angle bend, S bend is 1.5mm thick, the elevation of the intensity of high-quality steel stamping. Non-slip tread surface is horizontal stripes uneven surfaces, using 1.2mm thick GB high-quality steel stamping. 100mm long 400mm wide stepping stairs every high 250mm, steel frame and are stepping surface electrostatic spray. Door made of high quality MDF 18mm thickness, screw transmission assembly, hydraulic rod configuration is two, four springs, the maximum weight capacity is 580 pounds. S bend is rounded shape of the surface smooth and delicate, S is made of 2.0mm thick the elevation of strength quality steel stamping. Non-slip tread surface design graphic pattern shape, 1.5mm thick GB high-quality steel stamping. Stepping length 400mm width 100mm every step high 250mm, borders and stepping are steel, the surface electrostatic spray. Door using a special high density 18mm thickness, screw transmission assembled configuration is two springs, two hydraulic rod, maximum load 680 kg.