Description:[PARAMETER] Overall Size: 40 x 40 x 11 mm / 1.57 x 1.57 x 0.43 inch (L*W*H); Color：Black.[APPLICATION] Great for cooling chips, stepper motor driver module and other small electronics that didn’t come with any cooling.[DESCRIPTION] This heatsink come without any thermal tape or adhesive tape, we recommend using some glue (here is not included) to stick.[FEATURE] With horizontal and vertical cooling slots.It only take seconds to install, easy to install.[NOTE] Some scratches may be caused in the production process, but this does not affect the cooling effect.