... : 80~630mm, lead time: 4~5weeks 1.Materials :Aluminium Alloy. stainless steel etc.2.Thickness:1.5mm 3.Size:80-630mm .2 ... ,air grille,damper,quadrant handle,bushing,duct corner,clamp,latch,spindle…..To more more about us,please browse site stainless steel round vents