This yellow fasel is a Toroidal design with the tonal character of a cup core, best for attaining a vintage vibe. Use the precision-wound Toroidal, part number P-ECB-FI-02, for the cleanest sound possible. The Fasel inductor is back! These near-mythical inductors are the key to the singing tonal sweep every wah player lusts for but can't capture with a new pedal. The ultimate upgrade to your current wah, these magic bullets are available exclusively from Dunlop, the new worldwide agent for Fasel of Italy. Your wah will finally give up the lush harmonic sparkle you've always heard in your head but could never coax from your rig.