Newark Wire Cloth’s Stainless Steel Test Sieves are manufactured using 300 series stainless steel. Unless otherwise specified the sieve frames are manufactured using 304 SS. They can also be fabricated using either 304L SS, 316 SS or 316L SS but these would be considered a special order. The ASTM E11 Sieve Cloth is typically supplied in 304 SS, but is often available in 304L SS, 316 SS, or 316L SS. If a 300 series stainless steel other than 304 SS is required please check with one of our customer service sales consultants as to its availability.