Specification AgeRangeDescription : adult Brand : Xzeit BulletPoint1 : 18 teeth Gear Modulus: 0.4 BulletPoint2 : Number of teeth: 18 BulletPoint3 : Inner hole: 2.98 mm BulletPoint4 : Total thickness: 8 mm BulletPoint5 : After strict manufacturing process, made of high quality brass material, hard and durable, has long service life.Small and light, easy to carry and convenient for installation, has good performance. Color : 18 Teeth ExternallyAssignedProductIdentifier : 6435659371111 ItemName : Xzeit Motor Brass Pinion Gear,Tooth Gear, 2.98mm Hole 3mm 0.4M 18T Teeth Copper Gears Thickness 8MM Small Pinions G-S (Hole Diameter : 2.98mm, Number of Teeth : 18 Teeth) ItemPackageDimensions_Height : 1 centimeters ItemPackageDimensions_Length : 3 centimeters ItemPackageDimensions_Width : 2 centimeters ItemPackageQuantity : 1 ItemShape : Square ItemTypeKeyword : worm-gears Manufacturer : Xzeit Material : Brass ModelName : Xzeit ModelNumber : Xzeit NumberOfBoxes : 1 NumberOfItems : 1 PartNumber : Xzeit ProductDescription : Our shop is based on the principle of "service and quality first" and we look forward to welcoming every customer. Small module gear is used for toy accessories, for mini cars, for remote control aircraft etc. How to calculate the calculation of gear? (for reference only) Gear module M = outer diameter ÷(number of teeth +2) Outside diameter = Gear module ×(number of teeth +2) Thank you for your visit, any problems can be contacted and resolved in person with the shop! ProductSiteLaunchDate : 2023-11-05T13:23:47.889Z Size : 2.98mm UnitCount : 1