... layer: imported polyurethane12, thickness of heat insulation layer: 50mm to 60mm13. pressurized system: 0.6MP14, material of support: Aluminum ... Alloy15, color of support: black16, inclination of frame: 38 to 45 degree17, capacity optional: 100L,150L,200L,240L,300L,400L ... 5 year responsibility for free repairing or exchange due to original quality problems More details please contact us directly.