Feature: and high quality This product is a gap measuring ruler for tooth, made from high-quality material for durable and long-lasting use. The gap gauge is one of the measuring instruments used to check the interdental space. High precision, smooth and clean appearance, good wear resistance. Can be sterilized in a steam autoclave, dry heat autoclave, or in chemical cold sterilant. Set includes following sizes: 0.10 mm, 0.15 mm, 0.20 mm, 0.25 mm, 0.30 mm, 0.40 mm, 0.50 mm. Material: Metal Color: Silver Size: About 4.5 x 1.2 x 1 cm / 1.7 x 0.47 x 0.39 in Package Included: 1 x Set measuring rulers Note: Our size is Asian size, 1-2 sizes smaller than Euro size. Please choose your size according to the size chart. Due to manual measurement, there may be a size error of about 1-2 cm. Item color displayed in photos may vary slightly due to different monitor settings.