these tank drums are all handmade by us from unused propane tanks…  we began making tank drums  in 2007 after stumbling across Dennis Havlena’s  page on how to make a propane tank hank drum (thank you Dennis !!) while researching the PANArt Hang…  our drums started off looking and sounding like most hank drums, slit drums, or steel tongue drums found on youtube,  not quite satisfied we  began experimenting and collecting  ideas that would bring us to what is now known as a Tankdrum (our version of the “hank drum”)… our Tankdrum was born through letting the natural resonant frequencies of the raw propane tanks dictate the keys and scales we use when tuning, our goal being to maximize the constructive interference of the notes to increase volume, sustain, and clarity… we also give our tanks a maximum heat treatment to temper the steel allowing rich overtones and harmonious atmosphere… each pads placement and the notes that surround it are critical to the ultra resonant sounds….