Features: Engineered for high efficiency torque output, this precisE gear motor delivers DC3V-6V power to robotics and devices while maintaining stable performanceS under varying load. With low noise operations and metal construction, the motor ensures quiet functionality perfect for noise sensitive application like educational electronic. Great for craft enthusiasts, robotics engineers, and STEM educator searching great motion control solution for creative project and technical prototype. Perfectly integrates into home automation system, science experiment kits, remote control toy upgraded, and miniature robotic arm requiring precise mechanical movements. With premium grade component and rigorously tested for endurances, this metal gear motor offers better longevity for repeated use in demanding robotics application. Specifications: Component: Metal Product Size: Approx. 1.5x1.2cm/0.59x0.47inch Applicable voltages: DC3V-6V Output Shaft Diameter: 3MM (with flat position, D-shape shaft) Output Shaft Length: 10MM voltages At 2.5V, Speed: 20rpm voltages At 3.6V, Speed: 40rpm voltages At 5V, Speed: 60rpm Package Includes: 4PCS Gear Motor note: Please allow 0-1cm error due to manual measurement Due to the differences between different monitors, the picture may not reflect the actual color the item.