Candela handpiece cover made of plastic for aimming the laser beam the protection of other parts and pieces inside handpiece, There are two types of covers as your system type ACC or DCD
Sometimes you have problems with it and you have to change it
If it was accidentally broken
If you find burns in the handpiece nozzle
But you must treat the cause of the burn first before replacing the cover, It is often the result of damage to the lenses or fiber, so we always advise periodic maintenance to keep the device parts