If you or your friends are ALWAYS are dropping the F-bomb in public then this WMD is for you!
This is design is made as a large key-chain dangle & Tritium Lantern (see pictures). Other sizes and dimensions are available.
GTLS sold seperately sizes 3x22.5mm, 3x25mm or 4x30mm prefered. Mount in glass/silicone mounted tubes or see http://facebook.com/BetaDecayProd for examples