The Mullard Mustard 400V Capacitor is one of the most sought-after vintage film capacitors ever made, prized by amp builders and restoration specialists for its legendary tone and reliability. Originally manufactured in the UK during the golden era of British valve amplifiers, these iconic yellow "Mustard" capacitors became standard components in classic Marshall, Hiwatt, Vox, and other vintage amplifiers.

With a 400V voltage rating, this capacitor is ideal for vintage amplifier restoration, tone upgrades, and high-voltage audio circuits where authentic period-correct components matter.

Ideal for engineers and technicians looking for high-quality, cost-effective capacitors to enhance circuit performance and durability.