Item No.: U65C039
.Material: fiberglass  framework, aluminum alloy footboard                
.Size = 8 Tread, Closed = 2.48m(H), Open = 2.31m                
.The thickness of fiberglass: 2.9mm                
.The thickness of aluminum alloy : 1.5mm                
.Isolation voltage: 30000V                
.Maximum load bearing: 150kg