Features 1、Made of high quality steel material, which makes it durable, sturdy and has a long service life. 2、Provide greater overall strength, as compared to brass or aluminum, high performance. 3、This 24 tooth, modulus 0.8 pinion gear will mate with any MOD 0.8 gear, high fitness. 4、4:1 ratio, underdrive or overdrive depending on whether you're set out to increase the speed or maximize torque. 5、Fine and precise workmanship, exquisite design, small parts suitable for DIY robot, Specification Item Type: Pinion Gear Material: Moulded Steel Color: As Picture Shown Hole Diameter: Approx. 6mm/0.24in Weight: Approx. 18.0g/0.6oz Product Model: S4304-0006-0024 specifications: 6mm Round Hole 0.8 Modulus Package List 1 x Pinion Gear