MaterialForged AluminumMale ThreadNPTMale Thread Size2-1/2"Storz Size4"Working Pressure150 PSIWeight Lb2.5800ConstructionMachined from forged 6061- T6 aluminumHardcoat anodized components per MIL-A-8625 Type III Class 1Available OptionsConsult Dixon for pricing and availability of other threads and sizes.