Specifications:

Tolerance:  +/- 10%

Operating Temperature:  85°C

Voltage:  400VDC 

Pure Aluminum Foil

Dielectric: Paper-in-Oil

Oil Type: Mineral Oil

Leads:  Tinned Oxygen Free Copper

Note:

Humbucker circuitry traditionally is using .022mfd as tone cap; Single-Coil wiring often uses .047mfd.

The higher the capacity of the tone cap, the more significantly the top end gets tamed. It is quit interesting to experiment a bit to find the perfect match for your guitar and playing style.