Feature 1Clear and Easy to Read: Our gauge inside caliper pointer readings are clear and easy to read, with longer life and high accuracy to help you minimize measurement errors. 2Specifications and Measuring Depth: Gauge inside caliper is available in 55153mm or 2.26in with a reading of 0.01mm and a measuring depth of 90mm or 3.5in. 310 Replacement Heads: The gauge inside internal caliper kit contains ten interchangeable internal caliper heads with different ranges and specifications for you to use according to the actual situation. 4Aluminum Material: Gauge inside caliper is made of aluminum alloy material with exquisite craftsmanship, wear resistant and practical, which can be used stably. 5Widely Used: Our inside caliper is widely used for the measurement of all kinds of bore, inside diameter, inside groove size.Item Type: Gauge Internal CaliperMaterial: Aluminum AlloySpecification: Approx. 55-153mm/2.2-6inReading Value: 0.01mmError: 0.02mmMeasuring Depth: Approx. 90mm/3.5inUse: Widely used in all kinds of internal holes, internal diameter, internal groove size measurement .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List1 xGaugeDialInsideCaliper2 x Wrench10 xGaugeDialInsideCaliper Head1 x Manual1 x Storage Box