AL 0765-278 / 7-08-03283 21" (20.75" Diameter) .065"/46 Heavy Grit Plus (Supergrit Equivalent) Disc Scrub Brush with Mounting Lugs for American Lincoln 7770, SR7770, SR7770HC Scrubbers. Our most aggressive filament. Designed for heavy duty scrubbing or stripping of sealed and unsealed flooring. Removes forklift tire marks, packed dirt and debris and staining. .070" / 46 grit Tynex-A or Hahls Nylon with embedded silicon carbide granules. Includes attachment lugs (7-45-05026). AL 7770 requires 3 disc brushes. Priced Each. Replaces Nilfisk American Lincoln 0765-278 (Brush with Lugs Attached), 7-08-03283 (Listed in parts book as brush only - we supply the attachment hardware - Brushes are ready to clip on).