Specification Brand : HARFINGTON BulletPoint1 : Size - Modulus: 1; Gear Teeth: 20; Outer Diameter: 23mm / 0.9"; Inner Diameter:8mm / 0.32"; Direction of Rotation: Right, Reduction rate: 10 : 1. BulletPoint2 : Material - The worm gear wheel is made of brass material, not easy to wear and tear, durable, and can last for a long time. BulletPoint3 : Feature - The worm gear wheel is compact, small volume, and light weight, it is easy to install and use, and the transmission process is smooth. BulletPoint4 : Application - It is used to decelerate the small motor and change the transmission direction. It can be applied to small motor products. BulletPoint5 : Package Content - 1pcs x brass gear wheel. ItemName : HARFINGTON Worm Gear Wheel Brass 1 Modulus 20T 10:1 Reduction Rate Right Rotate Drive Gear Box Shaft for Small Motor ItemPackageDimensions_Height : 21.6 centimeters ItemPackageDimensions_Length : 0.8 centimeters ItemPackageDimensions_Width : 14 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : worm-gears Manufacturer : HARFINGTON Material : Brass ModelNumber : hta220706hh0531 NumberOfTeeth : 20 PartNumber : hta220706hh0531 ProductDescription : The worm gear wheel is made of brass material, not easy to wear and tear, durable, and can last for a long time. The worm gear wheel is compact, small volume, and light weight, it is easy to install and use, and the transmission process is smooth. It is used to decelerate the small motor and change the transmission direction. It can be applied to small motor products.