... 320 x 220mmThickness: 3-3.5mm, 4-6mm, 5-7mm, 6-8mm, 7-9mm size(mm)3-3 ... 400*600,600*600,600*900 / customized size acceptcolor: black, yellow quartzite P014, rusty S1120, green, greysurface finish: ... 1000*1500, 1000*2000, 1200*2400mm / as you requiredcolor: black, yellow quartzite P014, rusty S1120, green, greysurface finish: natural ... honed, brushed5. Slate Roofing:thickness—3-3.5,4-6,5-7,6-8,7-9,8-10,9- ...