The Brunton Crux is a backcountry stove that provides the ease and simplicity of butane canister cooking, yet folds down to fit inside your coffee cup. Easily regulated by adjustable flame spreader. Uses conventional butane canisters. Burns one hour per cartridge. Excellent simmering function. Collapsible parts for max. packability. No priming necessary. Oversized burner head. Dimensions: 2.2" x 2.9" x 1.3". Weight: 3.1 oz.