MaterialForged AluminumSealBuna-NFemale ThreadNPTFemale Thread Size3"Storz Size2-1/2"Working Pressure150 PSIWeight Lb3.6520ConstructionRocker LugMachined from forged 6061- T6 aluminumHardcoat anodized components per MIL-A-8625 Type III Class 1Buna-N gasketsAvailable OptionsConsult Dixon for pricing and availability of other threads and sizes.