CL 30957A Front Urethane Squeegee for Alto, Clarke, and American Lincoln Scrubbers. Priced Each. Fits popular Nilfisk Clarke American Lincoln machines such as the Encore² 28 WB. 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 30957A. Our Part Number CL 30957A