Material: outsole: PU, inner: sponge, frame: square steel tube good quality Operation simple Handling convenient 1) Length:40"(1016MM);6 pcs 2.5" wheels;2) N.W. : 5.8KGS G.W. : 7KGS3) Qty per 40'container: 1100pcs4) Material: outsole: PU, inner: sponge, frame: square steel tube Steel Creeper