Formed Cylinders: 316 Stainless Steel onlyPressure ratings up to 5000 psig can be supplied as a special. Consult the factory for quotation of any cylinder rated above 1800 psig.When testing to ASME specifications is required, contact us for quotation and specify maximum More... pressure and temperatureOther MaterialsCylinders manufactured from other materials are available. Contact us for quotation.PTFE-lined CylindersThe interior of cylinders are available with a special FEP lining which provides excellent lubricity and very low permeability. To order add "PTFE-lined" following the cylinder part number. Less