MSR Heat Exchanger One Size. The unique waffled design channels the heat from the stove up the sides of the pot to increase the heated surface area of the pot. The Heat Exchanger is compatible with all MSR 1.5- and 2-liter pots (with the exception of the Titan 1.5-liter). Specifications for MSR Heat Exchanger: Manufacturer: MSR Weight: 6 oz Application: Cooking Color: One Color Stove Accessory: Stove Extra Features of MSR Heat Exchanger: Increase efficiency by 25percent Package Contents: MSR Heat Exchanger MSR 321105: Heat Exchanger One Size