Micrometer Screw Gauge, made of nickel plated brass, range 0-25x0.01mm, supplied in case-EIS-PH0086A offers a thoughtfully designed, durable resource for hands-on learning. Range: 0-25mm x 0.01mm Accuracy at 10mm is +/- .003mm Nickel plated brass Includes: (1) Micrometer Made of nickel plated brass, with ratchet top, accurately machined stainless steel rod. Range 0-25 x 0.01 mm, supplied in case. Accuracy is perfect for a hobbyist or student -- at 10mm, accuracy is +/- .003mm.