X31L One-liter Stabilizer air sampling canisters are fabricated from 316L stainless steel and have spun dished ends for added strength. The low carbon 316L grade of stainless steel makes it possible to achieve the highest integrity welds by minimizing the problems associated with carbide precipitation. All canister body welds are also fully penetrated while purged with a continuous blanket of ultrapure argon. The resulting oxidation-free and particle-free surface alleviates the potential for unswept surface areas and the entrapment of contaminants.