metric and inchThe surface printed with both metric and inch reading can meet your different needs. spring steel wireHeat treated spring steel wire, high hardness and not easy to deform. spark plug gap This gap gauge is specially design for measuring and adjusting spark plug gap. chrome-plated Chrome-plated round shell, wear resistant and no rust. durableFirm rivet linked structure, anti-impact and durable in use. The silver ones are imperial, and the silver ones with black borders are metric. Please confirm the metric and imperial systems before placing an order! Feeler gauge, also known as micrometer or thickness gauge, is one of the measuring instruments used to check the gap. You can directly read the size of the seam. Features: high precision, good elasticity, smooth appearance, good wear resistance, easy to use, etc. Weight: about 17.4g/18.5g Color: silver Material: high quality material Quantity: 1pcs Packing list: 1*motorcycle spark plug feeler gauge Only the above package contents are included, no other products are included. Note: The reflection of light and different monitors may cause the color of the item to be slightly different from the actual item. Measurements allow +/- 1-3 cm.