... .easily assembled 3.UV test 4.resist rust Greenhouse:1.base part:steel sheet, 19*0.6MM,:and Pre-painted Hot Dipped ... Steel sheet in aluminum color,base connector:aluminum,dia2.cover:0.25mm thickness PVC and white ... aluminum:1.2mm. Thickness of steel sheet:0.6mm the base partsize:110*110*44cmthe steel sheet frame is strong enough ...