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Mardatt 18 Pcs Precision Scale Calibration Weight Set10m to 500mg, 5g to 100g Grams Steel Weights Calibration with Tweezers for Digital Balance Scale, Jewellery Scale, M2 Class(Total 200g)★Product Specialization Material: stainless steel calibration Permissible Error: +/- 0.003gColor: Silver Calibration Class: M2Total Weight: 200g ★Why you Choose us ①Rust Proof Material: steel construction of calibration weight with chrome plated finish for well stability, corrosion resistance, and low magnetic susceptibility, good quality and Durable ② Accuracy Scale Weigh: Compared with the NIST-traceable calibration weights no appreciable difference in accuracy.(Permissible Error: +/-0.003gv). ③ Excellent Package: Presentation box is custom-recessed to fit these weights, and buffered with light-weight foam padding. The multi-layer packaging can avoid damage during transportation. ④Easy to Storage and Carry: Each of these weights are individually identified with their weight stamped into them for ease of reference, and packed in case. keeping the weights and tweezers orderly and protected; ⑤ Multi Purpose: Suitable for accurately balancing and correcting your scales, for Digital Jewellery Scale, General Laboratory,Commercial, and Educational use ★Package Includes: 1 x 100g 1 x 500mg 1 x 50g 2 x 200mg 2 x 20g 1 x 100mg 1 x 10g 1 x 50mg 1 x 5g 2 x 20mg 2 x 2g 1 x 10mg 1 x 1g 1 x tweezers totally 18Pcs Warm Tip: only use tweezers or wear gloves to take it when using.