We can supply copper grit which mainly used in getting rid of rust in ships and metals. It is a best abrasive material in the world, the parameters of it are as below: Size: 8---30mesh(0.6---2.5mm), Grain degree: 30 mesh Hardness of degree: More than 6 grade Moisture: 0.1% Electric conductivity rate: 0.6ms/m Fe2O3: 29---36% CaO: 6---12% Cu2O: 0.2--0.6% Al2O3: 2--4.34% SiO2: 28--33% Color: Bright black Shape: Sharp angle forms pH: 6.8--8.0 Original: China. Tel:0086 13605622194 MSN:luhui.happy@hotmail.com