6" (150mm) Digital Inside Groove Caliper Measurement Micrometer Ruler 6''/150mm inside groove digital caliper ; Range: 0.7" - 6" / 18mm - 150mm Resolution: 0.01mm / 0.0005"; Accuracy: 0.03mm / 0.001";Repeatability: 0.01mm/0.0005" Data Output: Serial output for interface with host computer or printer ; Auto Power Off Great for checking grooves, recesse, wall thick-ness, and conventional outside caliper measuring. Quantity: 1 ;Storage Case overall dimension: 3-3/8''L x 9-5/8''W x 1''H ; Weight: .65 lbs(with case)