Mingder Calcite Color sorting machine, can also sort various mineral stone, sands, similar big size up to 150mm dimension. Hefei Mingde Optoelectronic Technology CO., LTD WELCOME TO US FOR TESTING AT ANY TIME ! Pls contact us: TEL: 0086-551-62578095 WEB: www.hefeimd.com/en Mobile/whatsapp: 008613966725592 Skype: dianahongsmile Email: dianahong@hefeimd.com