😀Description: This airsoft propane filling adapter is used with any standard camping style propane tank. It adopts non leaking design. Store silicone oil and lubricate the GBB with supplemental propane.  Feature: Silicone Oil Container: It can store silicone oil and lubricate the GBB with supplemental propane. It is a good alternative to green natural gas.  Propane Mixed with Silicone Oil: Only when you press the valve stem will the silicone oil be discharged together with the propane into the GBB magazine. This product is reusable.  😀Specification: Product Name: Airsoft Propane Filling Adapter Product net weight: 31g Product size: 45×36×30mm Material: Metal, Silicone Color: Red  😀Parts List: 1×Airsoft Propane Filling Adapter  😀Notes: 1.If leaking, it should not be sealed. A layer of silicone oil can be applied to the rubber ring inside the adapter for sealing. 2.There may be slight differences between the picture and the actual color of the commodity. We will try our best to show you the exact color. 3.Please allow slight dimension difference due to manual measurement.