Payment Term? L/C or T/T Feature? a) 3 adjustable heights device (25/20/15cm), b)Interlocking/connecting device makes easier the connecting with the top layer & bottom bases-it won't fall off & just assembled in seconds, c)3 additional bracers device provides much sturdy construction & enhance its steadiness, d)The top stepping layer is with one time injection with step body device which you never worry about the peeling off problem on edge, e)TPR made stepping layer provides non-slippage characteristic & more secure while exercising, f)Additional 4 rubber end caps on each bottom base provides safer & sturdier construction Package/Packing? 1pc/color box, 2pcs/ctn/ctn/5.00', N.W.15kg, G.W.17kg, 400 pcs/1x20'container, 800pcs/1x40'container