The piston accumulator series SK350 is HYDAC's most versatile series with a repairable design and large selection of options. The largest range of possible sizes, material construction, and other options are offered. Standard and Low Friction piston designs are available for superior performance and flow rates. Features of this series are: Bore Diameters from 2.4" ID to 19.3" ID, Sizes from 1 quart to 200 gallons, Largest range of possible sizes and material options, Standard and Low Friction piston designs available, Largest variety of gas and fluid port options, A variety of piston position sensor monitoring systems are available, ASME, CRN, PED/CE and other pressure code certifications are available.