Specification Brand : MKSIWSA BulletPoint1 : Modules: 0.4 M; Tooth number: 9 teeth BulletPoint2 : Inner Hole: 1.98 mm (Tight for 2 mm motor shaft fit) / 1.48 mm (tight for 1.5 mm motor shaft fit) BulletPoint3 : Total thickness: 4 mm BulletPoint4 : The largest diameter: 4.4 mm BulletPoint5 : Material: Brass Color : 9 Teeth CompatibleMaterial1 : Metal CompatibleMaterial2 : Copper ExternallyAssignedProductIdentifier : 9406090465278 ItemName : MKSIWSA Industry 10pcs 0.4M 9Teeth Copper Pinion Gears 2mm/1.5mm Shaft Metal Gears Motor Parts Accessory (Size : 1.5mm Tight, Color : 9 Teeth) ItemPackageQuantity : 1 ItemTypeKeyword : rack-and-pinion-gears Manufacturer : SUOFEILAIMU-US Material : Metal NumberOfItems : 1 NumberOfTeeth : 16 PartNumber : SUOFEILAIMU-123 ProductDescription : Modules: 0.4 M Tooth number: 9 teeth Inner Hole: 1.98 mm (Tight for 2 mm motor shaft fit) / 1.48 mm (tight for 1.5 mm motor shaft fit) Total thickness: 4 mm The largest diameter: 4.4 mm Material: Brass ProductSiteLaunchDate : 2022-01-11T02:18:14.849Z Size : 1.5mm Tight Style : Industry UnitCount : 1 UnspscCode : 52140000