Common Thickness:0.3mm--1.2mm Slat option: 37mm,39mm, 45mm,55mm,,77mm,90mm,100mm Rail option: 80mm,90mm,100mm guide ... density Pu Foam inside.Rolled press and extruded technology aluminum slat, double-layer and punched hole can be available.White, champagne ... with quiet voice and Slide smoothly.Environmental and fashionable. luminium roller shutter slat