These OIML Class F1 calibration weights are designed for testing and calibrating digital scales, They are made from nonmagnetic stainless steel which makes them suitable for electronic balances, Solid, one-piece construction, A protective plastic case and white cotton glove are included, These weights are very precise and should not be handled with ungloved hands to prevent skin oils from changing the accuracy of the weight, 200g OIML Class F1 (1, 0mg), No certificate included - If you need a certificate, check out our Troemner weights here, Includes storage case, Includes white cotton glove, One-piece construction - no adjustment cavity, Non-magnetic Stainless Steel, Mass: 200g, Accessories: Plastic Case, White Cotton Glove, Dimensions: 1, 1""D x 1, 8""T, SKU: AWS381