Specification Brand : Ohaus BulletPoint : Troemner ASTM Class 1-4 offer high accuracy with tight tolerances and uncertainties of less than 1/4 of the tolerance. Weight surfaces meet or exceed ASTM and have a highly polished finish. Available in high grade stainless steels including Troemner Alloy 8 which possesses closely controlled density, extremely low magnetic properties, good stability, and resistance to corrosion. ItemName : Ohaus 30391449 Weight 2P ASTM 500g CL1 Accrd TR ItemPackageQuantity : 1 ItemTypeKeyword : science-lab-weights Manufacturer : Ohaus NumberOfItems : 1 PartNumber : 30391449 ProductDescription : Ohaus 30391449 Weight, 500 g, ASTM 1, NVLAP Cert ProductSiteLaunchDate : 2017-08-07T13:37:53.366Z SupplierDeclaredDgHzRegulation : not_applicable UnspscCode : 41111500