WR5010W-25
WR5010W-25 Z-Rag Bulk Reclaimed White T-Shirt Rags - 25 lbs
You will see that the model is described as Various, which is really handy here.
WR5010W-25 Z-Rag Bulk Reclaimed White T-Shirt Rags - 25 lbs FyterTech Nonwovens
A nice touch on the Oil Equipment Mfg 4171 is the drip tray that catches spills and keeps things tidy.