Item Type: RC Car Gear Sets Material: Chromium molybdenum alloy steel Color: Black Tooth Number: 33T 34T 35T 36T 37T Gear Pitch: 48DP/0.53M Center Aperture: Approx: 3.175mm/0.12in 33T Size: Approx: 18.4x11mm/0.72x0.43in 34T Size: Approx: 19x11mm/0.74x0.43in 35T Size: Approx: 19.6x11mm/0.77x0.43in 36T Size: Approx: 20x11mm/0.78x0.43in 37T Size: Approx: 20.6x11mm/0.81x0.43in Application: Suitable for 1/10 RC remote control model car motor 3.175mm/0.12in shaft Package List 5 x Motor Gear 5 x Machine Screw 1 x Wrench 1. Please allow slight error due to manual measurement. Thanks for your understanding.2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard. 1Product Information: Gear pitch is 48DP/0.53M, 33T 34T 35T 36T 37T is the number of teeth on the pinion gear. Suitable for 1/10 RC remote control model car motor 3.175mm/0.12in shaft. 2Smooth Working: The pinion gear sets has excellent machining performance, low roughness and noise, which makes it roll smoothly. 3Free Style: The speed depends on your gear ration, providing pinion with different number of teeth, making you have more choice in the gear ratio. 4Material: High precision chromium molybdenum alloy steel material, heat treatment process surface, strong wear resistant and stable performance. 5Exquisite Workmanship: Precision machining, with its own fixing screw holes, easy to install and operate, the package comes with machine screws.