NOTE: this is for the attachment piece only. Tough, durable bristles in a unique v shape quickly scrub your grout back to life. No harmful cleaning chemicals needed. Size: 22.9 cm x 3.8 cm / 9″ × 1.5″ USE & CARE Attach to Telescopic Mop Handle or Multi-Use Handle by depressing the push-buttons on the Grout Brush Attachment and sliding it into the handle until the push-buttons lock into holes. If using with mop handle, adjust it to desired height. Not for use with the Spray Mop Attachment. Pair with a Norwex cleaner of choice, such as Probiotic Hard Surface Cleaner Concentrate or Bright & White Laundry + Home Booster, for complete cleaning power. Always test in an inconspicuous spot on specialty surfaces. Once scrubbing is complete, use an EnviroCloth® or Wet Mop Pad to wipe away dirt and debris Rinse brush after each use