Ordering Description Product number Description: Victor Professional Single Stage SR 450, High Capacity, D (125 PSIG), Oxygen, 540, 9/16-18 UNF (M) Product number: 0781-0527 Description: Victor Professional Single Stage SR 450, High Capacity, D (125 PSIG), Inert (Nitrogen, Argon, Helium Product number: 0781-0528 Description: Victor Professional Single Stage SR 450, High Capacity, D (125 PSIG), Air - 3000 PSIG, 346, 5/8-18 U Product number: 0781-0532 Description: Victor Professional Single Stage SR 450, High Capacity, E (200 PSIG), Inert (Nitrogen, Argon, Helium Product number: 0781-0543 Description: Victor Professional Single Stage SR 460, High Capacity, A (15 PSIG), Acetylene, 300, 9/16-18 UNF LH Product number: 0781-0583 Description: Victor Professional Single Stage SR 460, High Capacity, A (15 PSIG), Acetylene, 510, 9/16-18 UNF LH Product number: 0781-0584 Description: Victor Professional Single Stage SR 461, High Capacity, B (40 PSIG), Acetylene, 510, 9/16-18 UNF LH Product number: 0781-0589 Description: Victor Professional Single Stage SR 461, High Capacity, D (125 PSIG), Acetylene, 510, 9/16-18 UNF LH Product number: 0781-0595