Replacement humbucker covers for a drop on replacement for all humbuckers of appropriate pole spacing (double check your pole spacing! It's critical to match it perfectly)
The material of the cover will affect your pickup tone. Nickel silver will cause a subtle decrease in treble response, brass will cause a far more significant decrease, Brass is perfect for taming bright pickups.
Slide on top of your humbucker and solder each side onto the baseplate. The plating will require scratching/filing off at the solder joints (except unplated and nickel plated covers).
Unplated nickel silver covers will have minor manufacturing marks on them. Do not expect a perfect finish.