Ordering Description Product number Description: Victor Professional Single Stage SR 350, High Capacity, D (125 PSIG), Oxygen, 540, 9/16-18 UNF (M) Product number: 0781-2341 Description: Victor Professional Single Stage SR 360, High Capacity, A (15 PSIG), Acetylene, 300, 9/16-18 UNF LH Product number: 0781-2400 Description: Victor Professional Single Stage SR 360, High Capacity, A (15 PSIG), Acetylene, 510, 9/16-18 UNF LH Product number: 0781-2401 Description: Victor Professional Single Stage SR 350/360 540/300 Oxygen/Acetylene Regulators - Dual Pack Product number: 0781-3283 Description: Victor Professional Single Stage SR 350/360 540/510 Oxygen/Acetylene Regulators - Dual Pack Product number: 0781-3284