... resistanceaccessoriesnoSlate thickness30-40mmmaterialblack slatelogoEngraving image and colour logo are optionalshaperound(other shapes are available, like square, heart, rectangle etc)Main marketUSA, Europe ... , slate stair, slate windowsill, etc. we also supply round,heart,square shapes:Quality certificate: 1>,LFGB certificate 2>, FDA certificate 3 ...