Cornell Dubilier 940C 0.01uF 500Vac (3000Vdc) - 10 % Polypropylene Film Capacitor.
It is a well known secret that placing these in parallel with other
capacitors in your crossover will improve its sonic abilities.
A cheap and very effective way to squeeze a bit more from your system.
The ones we stock are 500Vac (3,000Vdc)
Dimensions; 11.5mm Diameter 34mm Long (120mm Including leads)