Puretane N-Butane Food-Grade Triple Refined 9X Filtered Butane Gas - Choose Your Quantity Food-grade BPA-free plastic lined can Triple Refined through fractional distillation 9X Filtered - Near Zero Impurities 99.9998% N-Butane, 0.0002% Isobutane Made in USA / 300 ml / 10.14 fl.oz / 167 g