Item Type: Servo Spur Gear Material: High Quality Steel Model Size: Model Number of external teeth 4307-1025-0012 12 4307-1025-001515 4307-1025-0020 20 4307-1025-0024 24 4307-1025-0030 30 4307-1025-0040 40 Tooth Shape: Spline Number of Internal Teeth: 24 Purpose: by Combining with Other Gears with Different Numbers of Teeth, Different Torsion and Drive Ratios Can Be Provided Package List 5 x Servo Spur Gear Use It with Other Gears in a Reasonable Match to Be Effective 1There are 6 kinds of teeth to choose, made of highquality steel material, with high strength 2By combining with other gears with different numbers of teeth, different torsion and drive ratios can be provided 3The steel gear of a 24-tooth servo steering gear with a modulus of 0.8 can be matched with any gear with a modulus of 0.8 4You need to choose different gear ratios according to the actual situation and use them in your equipment 5Using advanced technology with great craftsmanship to bring glossy surface, which will not hurt your hands