Product name: O-rings Material: rubber Size : Thickness: 1.8 mm / 0.18 cm ;Outside diameter: 5.6 mm / 0.56 cm ;Internal diameter: 2 mm / 0.2 cm ; Thickness: 1.8 mm / 0.18 cm ;Outside diameter: 7.6 mm / 0.76 cm ;Internal diameter: 4 mm / 0.4 cm ; Color: black Weight: 1 G /2 G This oil containing O-ring is made of rubber material, round section, easy to install. Feature high and low temperature resistance, UV-resistance, Ozone resistance, abrasion resistance. Applications: of form, of electrical, mechanical, industrial, construction equipment, Prime Furnishing of other field. Perfect for personal and professional tools, garages, installation and part services. Colored black rubber oil sealing rings, oil resistance, abrasion resistance and water resistant. O-rings are donut-shaped rings that are used in industry environments to close or prevent leakage of liquid or gas in an application. Suitable for static and dynamic sealing.<br><br>Package Contents: 20 x O-rings<br><br>Only the above package content, other products are not included. Note: Light shooting 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.