Features: 1Propane filling adapter can store silicon oil and lube your GBB with refill propane. 2The silicone oil will mix up with the propane while not use. The silicone oil will not leaks out from stem. 3Mixed propane with silicone oil only when you press the stem the silicon oil will go out with propane. 4Easy to use use with any standard campingstyle propane gas tank. 5Made of quality metal material corrosion resistance antirust sturdy and durable. Specification: Item Type: Propane Filling AdapterMaterial: Metal + SiliconeColor: RedThread interface: 7/16-20UNFWeight: Approx.31g/1.1ozApplication: Use with any standard camping-style propane gas tank Package List: 1 x Propane Filling Adapter Note: 1. Monitors are not calibrated same item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.2. For use with air guns only. Add 3 drops of silicone oil to the oil port before filling. Do not use WD40 as a substitute for silicone.3. The nozzle of this adapter is not compatible with the magazine of the oversized base plate. It will not get to the nozzle of guns like for WE HiCapa.4. Propane is heavier than air so don't use it indoors. Propane is toxic if inhaled in large quantities and is extremely flammable.5. Please note that the new type and old type of this product will be sent randomlyand make sure you will not mind before ordering.