Lincoln Power Wave 300C Education One Pak K4934 1 Model:Factory Demo while 9SS31651 1 is the orderable Select Your Head:WITH STEEL WHEEL HEAD 3900SWH while 9SS31651 1 is the orderable SKU used for this listing The B&B Sumner PJVH Pipe Jack V Head is a heavy duty 5" (127 mm) V head designed to provide secure The Power Wave 300C Advanced Educational One Pak incorporates numerous user focused design elements that enhance operational efficiency and adaptability for educational environments The optional 115V (10A) AC Duplex Auxiliary Power Receptacle features Surge Blocker Technology to ensure simultaneous welding performance is not compromised by high starting current devices