Digital Thickness Gauge, Diamond Gauge, Thickness Gauge, Digital Gauge, Pearl Gauge, Jewelry Gauge, Measuring Gauge. Digital Thickness Gauge,Diamond Gauge, Thickness Gauge,Digital Gauge, Pearl Gauge,Jewelry Gauge, Measuring Gauge.Product Size:Measures in: 0-15mm by 0.01mmThis ... 1.55v button cell that lasts 8-12 months, and a compact carrying case. Weighs in g/ct/dwt and gn ...