the motor speed controller measures 2.9 x 1.9 x 1.1 inches/ 7.4 x 4.7 x 2.8 cm and is made of PCB and aluminum; The DC motor speed regulator has an operating voltage of 6V-30V DC, a rated current of 6A, a maximum current of 10A, a maximum power of 180W, and a speed regulation range of 0% to 100% the rigid flange coupling measures 0.9 x 0.5 inches/ 2.2 x 1.22 cm with an inner diameter of 0.24 inches/ 6 mm; It is made of electroplated iron for excellent strength, durability, and wear resistance; The flange coupling is made with high- technology 1 set JGB37-520 gear motor with motor bracket, 1pcs DC motor speed controller, 2 pcs flange coupling connectors, 8 pcs screws, 1 pcs wrench, 8 pcs M3 screws; Our kits are sufficient quantity to meet your daily use and replacement needs the DC reduction motor is constructed of strong and zinc alloy housing, ensuring a longer service life; The 5.5mm D-shaped output shaft offers good toughness and impact resistance, making the large torque reduction motor extremely ; This reduction motor has the characteristics of low consumption and high safety micro DC 12V 600rpm geared motor and motor speed controllers are ideal for miniature DC gear motors in robotics, power tools, model making, small automation equipment, and smart devices; High-hardness guide rail model accessories are ideal for a variety of DIY applications, RC motor model shaft connection