Feature: 1. Anodized Aluminum Material: Surface adopt aluminum material after anodized treatment, good quality and durable 2. Matched With Any Gear With 0.8 Mod: A spur aluminum gear with a modulus of 0.8 can be matched with any gear with a modulus of 0.8 3. Designed And Assembled In Various Ways: The gear surface has 4 long and 12 round multiple holes, which can be designed and assembled in various ways 4. For Intelligent Robots: Spur gear is suitable for intelligent robots, industrial machinery and equipment, etc. 5. Corrosion Resistant: The center hole size for 14mm, thickness is 4mm, not easy to rust, corrosion resistant Specification: Item Type: Spur Gear Material: Aluminum Surface Treatment: Anodic oxidation treatment Center Hole Size: Approx. 14mm / 0.55in Modulus: 0.8 Thickness: Approx. 4mm / 0.16in Model Number of Teeth 4312-0414-0058 58 4312-0414-0060 60 4312-0414-0062 62 4312-0414-0064 64 4312-0414-0066 66 4312-0414-0068 68 . Package List: 3 x Spur Gear Note: Please match the appropriate design size before use.