TN 1246599 / 4034542 18" Pad Driver Assembly for Tennant. Fits Tennant T600 (36" Disc Brush Models) walk behind floor scrubbers. Pad drivers are constructed with short trim polypropylene which is designed to securely hold your 18" floor pads. Includes drive plate and pad centering device. These models require two pad drivers. Priced Each. Replaces Tennant 1246599, 4034542. Our Part Number TN 1246599