1)Chinese black slate 2)black color 3)nomal size:30*30.1.2,30*60*1.5-2,40*40*2... 4)original:China 5)sweet price:$6~14/M2 Chinese black slateDear Sirs, Thank you for your interested in our black slate. This black slate is our main products.We have very good offer for it.If you have such inquiry,pls no hesitate to contact with me.You will find we are the right supplier you want to find.Best ...