Black slate coaster: 1 Lowest price and best quality and natural 2 owned factory 3 Heat insulation 4 Customized Black slate coaster:1, Color:black,green,grey,rusty2, Packing: carton with foam, sticker,corner protector,gift box, color box * 4 ~6 pcs as a set in a small box * 4~ 6 pcs as a set in a color box ,* as customers' requirement .3, Back pads: ** Black EVA pads Dia1.5cm , 3mm / 5mm ...