Gk-300precious metal tester gk-300(simply easy & accurate gold k, pt testing) capacity : 0.01-300ggold : k9-24 & %density : 0.01gcm3 featuresgold : lo, k9, 10, 12, 14, 16, 18, 20, 21, 22, 23, 24 & purity 99%density : 1 to 0.01gcm3 (depends on weight of sample )measuring range 0.01 to 300gminimum weight 5gweight dimension : 1.54 kg 218-190-170mmpower supply ac100-240vcalibration weight equippedoption : airtight windsheild, compact printer.