CL 30816U Urethane Rear Squeegee for Alto, Clarke, and American Lincoln Scrubbers. Priced Each. Fits popular Clarke American Lincoln Focus II Mid-Size 26" Disk. Polyurethane blades are commonly used for special situations where heavy oils or chemicals exist. These urethane blades are also very abrasion resistant and can be used in glass manufacturing facilities, bottling plants, or other areas where broken glass may be an issue. These can also be used on concrete sidewalks and similar abrasive surfaces. Replaces Alto, Clarke, and American Lincoln Scrubbers 30816U. Our Part Number CL 30816U