Zebra 5100 Resin - Print ink ribbon refill (thermal transfer) - 1 x black - 4.3 in x 1480 ft - for Zebra R-140, R4Mplus, S4M; PAX 110, 170, R110; Xi Series 110, 140, 170, 220, R110 (05100BK11045) at TigerDirect.com
How to Change a Ribbon on a Zebra S and Z series Printer - YouTube