Air Gun Propane Filling Adapter With Silicone Oil Port Filling Adapter LubricateOOTDTYfeatures: Material: made of metal and silica gel, easy to use and . Airgun propane filling adapter, store silicone oil and lubricate Gbb with refilled propane. Non-leakage design: When not in use, silicone oil will be mixed with propane. Silicone oil will not leak from the valve stem. Mixing Propane and Silicone Oil: Only when the valve stem is pressed, the silicone oil will flow out along with the propane and enter the Gbb cartridge. Specification: Material: MetalColor: Black, RedProduct Size: Approx. 47.2mm/1.86inNet Weight: 32g/0.07kg40g/0.09lbsPackage Includes: 1pc. Propane Filling AdapterNote: Please allow 1-2cm errors due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Note: For use with an air rifle only. Before filling, add 3 drops of silicone oil to the oil port. Do not use WD 40 in place of silicone. The nozzle of this adapter is not compatible with an oversized base plate cartridge. It won't reach the nozzle to fill the gun like we did the hi-cap. Propane is heavier than air, so don't use it indoors. If inhaled in large quantities, propane is toxic and extremely flammable. The color of the items shown in the picture may be showing slightly different in your computer monitor since the monitor has not been calibrated same.