This diode laser stack 10bar Model for hair removal which has 10bars with a aluminum shell. The water holes are on the bottom of the stack. Electrodes are on the back of stack also.
It is used for most of diode laser hair removal machine from China. wavelength 808 or mix wavelength as 755nm, 808nm and 1064nm.
This diode laser stack usually burn out after working 1year. Then it need to be refresh. Or you can buy a new one to replace the old one.