The 68866 commercial hard floor brush is designed for use in applications where there is a concern about damage to floor surfaces. The robust soft natural fill will conform to the surface making it ideal for hard wood or uneven surfaces. The 11” window cut on the face of the tool allows capture of larger debris and insures air flow for effective cleaning. Compatible with all major brands of back pack vacuums using 1 ½” s-wands including Sanitaire, Pro-Team, Karcher, Tennant, Mosquito, Mercury, Hawke, Nilfisk, and Sandia. Compatible with dry and wet-dry canisters equipped with commercial s-wand equipped with industry standard compression couplings.