Dear sir, We are one biggest of mica ferric oxide grey and mica ferric oxide red OEM in Anhui China.These two products all are used in chemical industrial like painting and coating industrials. The detailed specifications of them are as below: Mica ferric oxide grey: Fe2O3: 85-93% Min;Water 0.5%Max;Water mixture 0.1%Max; Ph 6.0-8.0;oil Absorption 9-12%;SiO2 3.0% Color Steel grey Size 325mesh ,400 mesh and 500 mesh. mica ferric oxide red: Fe2O3 85-90% Min;Water 0.5%Max;Water mixture 0.3%Max; Ph 5.5-7.5; oil Absorptio 9-14%; SiO2 3.2%; Color Red brown Size 325mesh ,400 mesh and 500 mesh. If you interested in our products pls contact with me freely!