Specification AgeRangeDescription : adult Brand : Xzeit BulletPoint1 : 0.8M 9T, 1.25M 9T, 1M 9T BulletPoint2 : Small module gear is used for toy accessories, for mini cars, for remote control aircraft etc. BulletPoint3 : How to calculate the calculation of gear? (for reference only) BulletPoint4 : Gear module M = outer diameter ÷(number of teeth +2) 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 : 1.25m 9t 3mm ExternallyAssignedProductIdentifier : 6435659371449 ItemName : Motor Brass Pinion Gear,Tooth Gear, Small Pinions Gear Iron/Copper 9T 2/3/3.1/3.9MM Hole for Model Gears G-S (Hole Diameter : Copper gear, Number of Teeth : 1M 9T 3.1MM) ( Color : 1m 9t 3.1mm , Size : 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. Please check the gear size carefully: 0.8M 9T Material: iron base Number of teeth: 9 teeth Module: 0.8 Inner hole: Φ1.95(+0.02/+0)mm Outer diameter: Φ8.80mm Thickness: 4mm 1.25M 9T Material: iron base Module: 1.25 Number of teeth: 9 Inner hole: Φ3(+0.04/+0.02)mm Outer diameter: Φ13.50mm Thickness: 4.2mm 1M 9T Material: Copper Number of teeth: 9 Inner hole: Φ3.08~3.12mm/Φ3.18 OR Φ3.90(+0.06/+0.02)mm Outer diameter: Φ11mm, OR Φ10.70mm Length: 10mm OR 6.9mm Thank you for your visit, any problems can be contacted and resolved in person with the shop! ProductSiteLaunchDate : 2023-11-05T13:23:27.715Z Size : Copper gear UnitCount : 1