Precisionsound says that the Sun Drum is a modified diatonic version of a traditional steel pan. They tell us that it's a member of the Hang Drum family and was handmade exclusively by Sun'diibaad in Prague. Here's the details in their own words...
The Sun Drum has a clear and open sound that is less metallic than a traditional steel pan. Its forward, yet slightly hollow sound is created by uniquely shaped tongues and thermally modified metal. It was played with a medium rubber mallet in open and muted configurations. The muted playing style involves hand muting all tongues except for the one currently hit. In the open playing style, the tongues are allowed to resonate for a rich, coloured sound.
The Sun Drum features:
The natural range of the drum is F#2 – D#2. For this library, we stretched it for a playable range of C2 – C5 inclusive.
Full version of Kontakt is required, this library does NOT work with the free Kontakt Player.
Pricing and Availability:
$29 via download. A DVD version costs an additional $9.95. All formats are included.