Features 1、Glossy and Low Noise: The 48DP motor pinion gear works smoothly with little roughness and noise, which rolls smoothly 2、Screw Installation: Good processing makes the gear roll smoothly, with fixed screw holes, easy installation, simple operation, equipped with screws 3、5 Tooth Counts: The package offers five different tooth count pinions, giving you more choice in gear ratios 4、Scope of Application: The surfaces of Pinion gear is treated with anti rust treatment, which can replace old parts or damaged originals, suitable for 1/10 remote control model car 5.0mm shaft motor 5、Durable Material: The 48DP pinion gear is made of chrome molybdenum alloy steel, with heat treatment process, with hardness and wear resistance Item Type: 48DP Pinion Gear Set Material: Chrome Molybdenum Alloy Steel Colour: Black Number of Teeth: 21T, 23T, 25T, 27T, 29T Gear Pitch: 48DP/0.53M Center Aperture: Approx. 5.0mm/0.2in 21T Size: Approx. 12 x 10mm / 0.5 x 0.4in 23T Size: Approx. 13 x 10mm / 0.5 x 0.4in 25T Size: Approx. 14 x 10mm / 0.6 x 0.4in 27T Size: Approx. 15 x 10mm / 0.6 x 0.4in 29T Size: Approx. 16 x 10mm / 0.6 x 0.4in Suitable: For 1/10 RC Car Motor 5.0mm/0.2in Shaft Package List 5 x 48DP Pinion Gear 5 x Machine Screws