Description:A spur gear is the most common type of gear and consists of a cylinder or disk with teeth projected straight outward. A spur gear also generally looks the same from either side, since the teeth are straight from one side to the other.Attributes:• Material: Steel• Spur Gear Number of Teeth: 66• Internal Spline Number of Teeth: 21Application:Cat gears are built specific to their application to ensure all drive train parts work and wear together as a system.