... 2,Material: HDPE,100% ECO material,A3 steel 3,Leg of the seats: Aluminum alloy 4,ISO9001;ISO14001 SpecificationsMaterial: HDPE ( High ... to clients test it )Manufacture craft: Blow MouldingBase of the structure: A3 steelLeg of the folded seats: Aluminum alloyMachine: The most expensive ... from Japan on 1997 year. Speed is 1pc/ 2 minutes 2011 Hot High backrest of baseball seat stadium LX-2708a