USA Standard Testing Sieve, Wire Cloth Test Sieve, Stainless Steel Screen Material, Stainless Steel Frame Material, Mesh Size 1 1/16 in, Mesh Size Range Coarse, Wire Dia. 3.55 mm, Opening Size 26.5 mm, Outside Dia. 12 in, Frame Inside Dia. 12 in, Overall Depth 3.25 in, ASTM E11 Standards