A CubeSat (U-class spacecraft) is a type of miniaturized satellite for space research that is made up of multiples of 10×10×11.35 cm cubic units, has a mass of no more than 1.33 kilograms per unit, and often sees the use of commercial off-the-shelf (COTS) components for its electronics and structure. CubeSats are most commonly put in orbit by deployers on the International Space Station, or launched as secondary payloads on a launch vehicle.