Harris Two Stage Ultra High Purity Brass Barstock Regulator Model 721-250-540-D - 721250540D Cross Country while 9SL12378-2 is the orderable

while 9SL12378-2 is the orderable Lincoln SKU

Part Number EDS30776 AWS Classification AWS A5

Harris Two Stage Ultra High Purity Brass Barstock Regulator Model 722C-125-540-BE - 722C125540BE

Complete answer key for instructors

The only difference is diameter (3/32 in) and package format (1 lb tube)

Harris Two Stage Ultra High Purity Brass Barstock Regulator Model 721-250-540-D - 721250540D Cross Country while 9SL12378-2 is the orderableHarris Two Stage Ultra High Purity Brass Barstock Regulator Model 721 250 540 D 721250540D Model HP721 is a Single Stage Cylinder Regulator in Brass Barstock for pressure control of non corrosive gases when pressure rise is not critical. The Model 721 is suitable for High Purity gas applications, research sample systems gases, process analyzer gases, gas chromatography, EPA protocol gases, laser gas systems and emission monitoring systems. Features 1