Plastic Grit, Abrasive Media Type Plastic Grit, Grit 24, Container Size 25 lb, Compatible Mesh Size – Minimum 20, Compatible Mesh Size – Maximum 30, Compatible Blast Pressure – Minimum 20 psi, Compatible Blast Pressure – Maximum 50 psi, Number of Cycles – Minimum 4, Number of Cycles – Maximum 6, Container Type Box, Mohs Hardness – Minimum 3, Mohs Hardness – Maximum 3, Particle Diameter – Minimum 595 micron, Particle Diameter – Maximum 841 micron