Gas Tank Adapter Propane Filling Adapter for Outdoor Camping for Green Gas Tank with Silicone Oil Port

Features:
Made of superior and duarble material for long term use.
Non-leaking design, the silicone oil will not leak out from stem and it will mix up with the propane while not in use.
Only when you press the stem, the silicon oil will go out with propane and go inside to your GBB magazine.
Standard female thread, suitable for any standard camping-style propane gas tank.
Small and exquisite, easy to carry.