Specification Brand : Dilwe BulletPoint1 : The mini gear here can be mounted on a shaft without the need for a hub. BulletPoint2 : Constructed of hardened steel and mounted with two setscrews for excellent grip on 8mm shafts. BulletPoint3 : The hole is perfectly matched to the 8mm shaft to create positive actuation and easy installation. BulletPoint4 : Using high toughness material, durable and strong, wear resistant, long time use. BulletPoint5 : With 8mm hole, exquisite workmanship, it is a practical industrial robot accessory. ItemName : 4303-4008-0030 Replacement 30 Tooth Pinion Gears for Industrial Robot, 8mm 0.3 Inch 0.8 Module Hex Hole Cast Steel Pinion for Industrial Use ItemPackageDimensions_Height : 2 centimeters ItemPackageDimensions_Length : 3 centimeters ItemPackageDimensions_Width : 3 centimeters ItemTypeKeyword : rack-and-pinion-gears Manufacturer : Dilwe ModelName : Dilwe62x8uc74ib ModelNumber : Dilwe62x8uc74ib NumberOfItems : 1 PartNumber : Dilwe62x8uc74ib ProductDescription : Feature: 1. The mini gear here can be mounted on a shaft without the need for a hub. 2. Constructed of hardened steel and two set screw mounting for excellent grip on 8mm shafts. 3. The hole fits snugly with the 8mm shaft to create positive actuation and easy installation. 4. Using high hardness material, durable and strong, wear-resistant, long-term use. 5. With 8mm hexagonal hole, exquisite workmanship, it is a practical industrial robot accessory.