The unique appearance of the pickups comes from part of the process which creates them - the units are resin cast, eliminating the need for any form of cover. The humbuckers are built in a rubber mold into which the magnets and coils are inserted, a special aerospace grade resin is then pored over the entire thing, resulting in a perfectly sealed and shielded pickup.
All my current guitars are fitted with Dunlop Super Pot™. These are high end performance potentiometers designed to last a lifetime! Completely sealed and resistant to dust and corrosion, they provide a smooth audio taper that will never sound noisy or scratchy + they look really cool! My instruments are also fitted with either a rare 'new old stock' USSR military specs aluminium foil paper-in-oil 0.022uF 'K40Y-90' or a rare 'NOS' Russian 'FT-2' 0.022uF TEFLON capacitor!