This is product manufacturers code 640033090 by Schiefer. If you need to contact us about this product, please quote our product reference of 5993.
These Schiefer branded halogen G9 bulbs are fully compatible with normal dimmer switches, and do not require a transformer.
The small size of G9 halogen capsule bulbs means that many modern decorative light fittings utilise a G9 bulb, as they will fit in small glass shades where standard bulbs wouldn't fit.
(When installing a halogen bulb, make sure that you do not touch the glass part of the bulb with your bare skin - e.g. fingers, as the natural oils from your skin can considerably reduce the life of the bulb)