A classic spun aluminum Moon oil tank specifically made for motorcycles. This 4 quart (1 gallon) tank also includes all necessary fittings as well as rubber mounted mild steel weld on tabs to mount it to your frame! A high-quality oil tank that will look beautiful nestled in the loins of your chopper. If this item shows as in stock, then it is on the shelf and ready to ship, no waiting! Made in the USA. This tank comes with a 1-5/16"-12 thread filler cap. There are a variety of custom style 1-5/16"-12 thread oil and gas tank caps sold separately, including brass, aluminum, and cast aluminum styles from brands such as Lowbrow Customs, Mooneyes and LC Fabrications. You can easily change up the style and look of your bike with a different filler cap. Please note that there are both vented and unvented caps, this oil tank comes with an unvented cap as it has a separate vent on top of the tank, though you could really use either style you like.