Product name: stepper motor heat sink Heat sink size: 40*40*11MM Material: Aluminum Suitable for: forty two stepper motor Can be used for: 3D printer, CNC mechanical device Heat sink features: The motor generates warmth during use, and the warmth will proceed to extend when overloaded Motor performance continues to degrade as heat increases, so it is very important keep the motor at an inexpensive temperature A radiator can resolve most motor issues For cooling, you're value procuring Package Include : Heatsink * 1