Here's what other sites are saying:
Replacement 6v Xenon bulb for MYO Headlamps. Fits in MYO 3, MYO 5, MYO Belt 3, MYO Belt 5
- Mountain Gear
Petzl 6V Halogen Bulb (Duo & Zora)Replacement halogene bulb for the Duo and Duobelt headlamps.
- River Sports Outfitters