Gilson ISO 200mm diameter Round Stainless Steel Test Sieves meet ISO 565 specifications with tolerances to ISO 3310-1. Stainless Steel Frame with Stainless Steel Cloth assures a sieve with the longest possible service life. This is the best choice where contamination, sanitation or extreme wear is an issue. Full-height or half-height frames available. All are serial numbered and supplied with a certificate of manufacturing conformance.