Buy GE Mark II Refurbished IC3600LSRB1 Shift Register Circuit Board from our Online store. The Phoenix Controls is preferred by end users all over the world because it provides genuine OEM products at competitive costs. Just look at our Bently Nevada, GE Excitation Spares, Woodward, and GE Speedtronic stock. Visit https://thephoenixcontrols.com/  for more information and services.