We are Leading supplier & trader of Bore Gages with Micrometer head. Specifications: Interchangeable anvil is attached to a micrometer head for accurate dimensional setting. Wide measuring range with sub-anvils. Carbide ball contact point for durability. Extension rods (optional) can be attached for measuring deep holes. Optional Setting Rings offer the best method of zero-setting Bore Gages. Technical Specifications: Accuracy:2µm/.0008” Indication stability:1µm/.00004” Graduation: 0.01mm, 0.001mm, .0005” or