TN 33966 Urethane Side Brush Squeegee Assembly for Tennant. Fits popular Tennant machines such as the 530E. 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. Priced Each. Replaces Tennant 33966. Our Part Number TN 33966