standard features: ·The whole bed are made of steel and treated with acid and static plastic spray,anti-rust,anti-aging. ·The headboards can be installed and removed freely. ·The two ends of the crank are equipped with limit protecting device. ·The product has been assessed and conforms to the following standards: GB/T 19001-2000 idt ISO 9001:2000 dimension: ·size: 2030×900×530mm ·back section: 695×900mm ·seat section: 180×900mm ·femoral section: 290×900mm ·leg section: 610×900mm ·angle of back section: 0 °--70 °(±5 °) ·angle of leg section: 0 °--30 °(±5 °) ·N.W: ·G.W: ·packing specification:2070×920×290mm ·pcs.in one 20＇container:80 pcs. ·pcs.in one 40＇container:160 pcs.