This is the BernieDawg DragonTamer 3 "silent" damper cap for the MSR Dragonfly backpacking and mountaineering stove. This cap functions well on all fuels that the MSR Dragonfly stove is designed to use and does so with the correct and proper jets designed for those fuels. The cap will reduce the volume level of your MSR Dragonfly stove by a substantial amount, about 1/2 of normal sound volume levels at high flame, more sound reduction at low flame. It also makes your stove a better simmering stove. All BernieDawg DragonTamer caps can be used with kerosene or Coleman fuel. The BernieDawg DragonTamer is the original silent damper cap for the MSR Dragonfly made by the original designer and builder of silent caps for modern backpacking stoves.