MSR Isopro Fuel Canister 4OZ
80/20 blend of isobutane and propane; isobutane has a high vapor pressure, and this blend outperforms regular butane/propane mixtures
Use with MRS canister stoves: Pocket Rocket, SuperFly, WindPro, and Reactor; redesigned canister has a smaller diameter for optimal fit inside the 1.0L Reactor stove system
Burn time varies by stove
Also compatible with JetBoil, Snowpeak, and other brands