china newstar stone(VCT FACTORY) can export slate building material products,the surface is available for tumbled slate,meshed slate,mushroom slate,nature slate,culture slate,litchi slate,hone slate,polished slate,etc.the nature slate and hone slate is more suit for roofing tile.

The size of Roofing slate tiles 

Thickness: 5-7mm, 6-7mm, 7-10mm

Size: 10x20cm, 20x30cm, 20x40cm, 25x40cm, 25x50cm, 60x30cm.

And other size available.

more information,welcome to contact me!