SPX Stone/Fenner 1 gallon steel reservoir tank kit. These tanks are used on AC and DC SPX Stone/Fenner hydraulic power units. Included in the kit is a new reservoir, filler/breather cap, steel plug, plumbing magnet, and 4 mounting bolts. They are used on a variety of applications from dump trucks, landscaping trailers, lifts, haulers, wreckers, lift gates and presses, etc. The tank is 7.88 inches long and 6.70″ in diameter. The opening is exactly 4.755″ is designed to fit SPX Stone/Fenner units specifically. Please feel free to call if you need additional information. If you are unsure if your power unit is an SPX Stone/Fenner unit, please call, text, or email and we can help determine if this is the correct replacement for your hydraulic power pack.