Specification Brand : TOSYUWIR BulletPoint1 : Suitable for precision analytical balance scales with calibration accuracy of 0.0001-0.001g BulletPoint2 : Material: 316 stainless steel 0CR17N12MO2 BulletPoint3 : Material density :7.94 g/cm³ BulletPoint4 : Stainless Steel Sheet Weights BulletPoint5 : It is difficult to rust, making the measurement accurate, which can give you long-lasting service. ItemName : Calibration Weight Sets high Precision Stainless Steel Standard Weight Set Grade E2 1mg -500mg w/Aluminum Alloy Box ItemTypeKeyword : calibration-weights Manufacturer : TOSYUWIR PartNumber : TOSYUWIR GRADE E ProductDescription : Suitable for precision analytical balance scales with calibration accuracy of 0.0001-0.001 g 316 Stainless Steel Sheet Weights Each set of weights contains: 12 pcs/set mg: 1mg 2mg *2 5mg 10mg 20mg *2 50mg 100mg 200mg *2 500mg