CL 30817U Front Urethane Squeegee for Alto, Clarke, and American Lincoln Scrubbers. Priced Each. Upgraded rigid opaque polyurethane blades are designed for heavy duty use on oily, textrued flooring. Urethane blades can also be used for everyday scrubbing jobs on smooth flooring. Urethane blades outlast tan gum blades. Urethane is oil and abrasion resistant by natrue. Replaces Alto, Clarke, and American Lincoln Scrubbers 30817U. Our Part Number CL 30817U