The TSD Sapien Arms Ver2 Aluminum Propane Adapter is an excellent, user friendly alternative for gas-powered airsoft products. This trendsetting adapter features a thread-on cap with loop, silicon oil reservoir, and a texturized body for easy grip feel. The adapter does not need to be to be detached from the propane tank to apply silicon oil. For airsoft use only. Light silicon oil not included. Users MUST use silicon oil with this product.