step ladder, TUV/GS Approved, 20*30*0.9 mm tube, 200*300*0. ... :A)Easy openB)Easy climbC)sit comfortablySpecifications:1,with TUV/GS APPROVED2,20*30*0.9mm tube, 200*300*0.9mm ... .( This series of ladder we produce 2, 3, 4, 5 steps, 2, 3, 4 step already has GS approved.)Package:package: color label ...