9" Grout Scrubbing Brush Head - Case of 6 Package We also highly recommend that

We also highly recommend that you use a red spacer pad under this pad for best performance and to reduce the risk of injuring your square scrub machine

with durable double stitched edges

Rinse your nylon brush with hot water for 5 to 10 minutes after scrubbing to help the nylon bristles recover their original form

Sand blasting recovery (1/4")

9" Grout Scrubbing Brush Head - Case of 6 Package We also highly recommend thatThis special grout cleaning brush is constructed of stiff, red polyester bristles in a chiseled "V" shaped chiseled trim. This "V" shape and stiff bristles allow you to efficiently clean narrow grout lines and corners quickly. A swivel connector allows the head to pivot 180 to follow the grout lines during scrubbing. The head is 9" wide with a 1 " trim and can be used with a threaded handle (sold separately).