AL 708031791 17" Wire Scrub Brush with Metal Lugs for American Lincoln 7000 and 7700 Scrubbers. Aggressive carbon steel wire brushes are used for stubborn dirt and debris on unsealed concrete. Includes 2 metal lugs mounted around a 9.5" center hole. Each machine requires 3 brushes. Some 7000 and 7700 machines require 6 sectional scrub brushes per disc plate. Please check your machine before ordering. Weight - 9 lbs. each. Replaces AL 7-08-03179-1, 7-08-03179, Carlisle/Flo-Pac 864317, 36863417