... 300x600mm, 600x600mm,600x400mm,etc.(or client's request sizes.)4.Processing finishing:Natural split, saw, polished, honed,Mushroom,etc.Roof ... slate specification:1.Thickness:3-5mm,4-6mm,5-7mm or ... 400x200mm,400x250mm,500x250mm,ect.(or clients' request.)3.Processing finishing:Natural split, saw, polished, honed,Mushroom,etc.Usage: used ...