Nobles - 4" Swivel Caster - Part 1049048 - Replacement. Fits Nobles Models Speed Scrub 2001HD, 2401, & 2601 and Speed Scrub (SS3) 17, 20, and 24 Inch, Speed Scrub (SS5) 24, 26, 28, 32, & T5 Walk-Behind Scrubbers and Model Strive Walk-Behind Carpet Extractor. Replaces part numbers 612056, 630002, 1010388 & 1049048. Overload Sales Group is Your Source for All Things Clean!