The Vertical Series Non-JIC reservoirs incorporate a square body with a flat bottom that extends past the reservoir body to serve as the mounting surface of the reservoir. A sight glass and hardware to mount a cover are supplied loose with each reservoir. Standard Features: Reservoir capacities ranging from 5 to 40 gallons Channel gasket installed Cover plates are sold separately, refer to Cover Series 1, 2, 2A or 3 for available options Reservoir bottom is flat (1) 1/2 inch NPT drain (plugged) Exterior painted with a LDI gray primer Interior coated with rust preventative oil 5 inch back mount GT623 Series sight gauge, location varies by reservoir selected Card thermometer, dual scale 0°F to 220°F and -20°C to 110°C Sight gauge and hardware to mount a cover provided loose with reservoir Temperature Rating: Industry accepted design practice for hydraulic systems limits maximum operating temperature to 180° F (82° C), but materials used for fabrication of the reservoirs are capable of operating between -40° and 212° F (-40° and 100° C). Caution: Reservoirs are not designed for internal positive or negative pressure applications. For these applications, consult the factory.