MAIN APPLICATION: The bore dial gauge is used to measure internal dimensions of work pieces by comparative . STAINLESS STEEL MATERIAL: The inner scale dial gauge is made of stainless steel material, which ensures high durability and wear resistance. HIGH HARDNESS: The inner diameter indicator measuring tool is exquisite and applicable with high hardness, and it is strong and durable. SPECIFICATION: The measuring range of inner scale dial gauge is 50-160mm, and it has high measuring accuracy which is 0.01mm. PORTABILITY: The bore dial gauge has professional and practical design with beautiful appearance, and it's convenient to carry and use. Condition: Item Type: Dial Bore Gauge Measuring Range: 50-160mm Accuracy: 0.01mm Colour: silver Material: stainless steel Package Contents: 1 x inner diameter measuring cylinder gauge 1 x inner diameter side measuring rod 1 set x connector 1 x box (random color, don't accept the specified color) Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.