Cyclo (76-810x2-2PK) Shampoo Brush with Gray Flagged Ultra-Soft Bristles, (Pack of 2) Gray ultra soft upholstery brush is recommended for upholstery, fine carpets, and fine interiors Gray is the ideal brush for delicate surfaces. Each bristle is flagged, a technique that splits ends into multiple fine tips and holds moisture too. Ideal for use on headliners, leather, and other fragile upholstery, and natural fiber fine carpets Use genuine cyclo brushes to bring life back into worn carpet pile, to safely remove stains from rugs and headliners, or to clean-up upholstery 5/16-24 inch male thread means this brush useable on other single-head orbital machines such as Porter-Cable 7424XP. Secure metal stud mounting rather than hook and loop methods found on other machine brushes