1,Stadium seat 2,Material: HDPE,100% ECO material,A3 steel 3,Leg of the seats: Aluminum alloy 4,ISO9001;ISO14001 stadium ... 3 points,screw anchor included.Material: HDPE ( High density PE )100% ECO material ( Material can post to clients test it )Manufacture ... Blow MouldingBase of the structure: A3 steelLeg of the folded seats: Aluminum alloyMachine: The most expensive and advanced machine in Whole ...