TN 1216321 Oil Resistant Outer Side Brush Squeegee for Tennant M17 Riding Floor Scrubbers. Manufactrued with our new advanced Prematek oil-resistant squeegee material. This is an optional outer side scrub brush squeegee blade. This can be found on Tennant M17 riding floor scrubbers equipped with the optional side scrub brush. Measures 20.38" x 4.5". This blade works in conjunction with the oil-resistant inner squeegee, TN 1216319. We also offer this blade in an oil, chemical, and abrasion resistant polyurethane (TN 1224933). One outer blade required per unit. Priced Each. Replaces Tennant 1216321. Our Part Number TN 1216321