PB 3302057 Neoprene Side Back-up Blade for Minuteman Power Boss. Neoprene is used in cases where the standard duty tan gum blades won't hold up and distort. Neoprene blades are naturally chemical and oil-resistant and can be used in food processing plants, chemical plants and areas where tan gum blades might be affected by chemicals. They are also naturally chemical resistant and can be used where caustic chemicals exist. 20-1/4" x 3-1/2" x 1/4"oil-resistant black neoprene with 5 mounting holes. Two blades are required per unit (Left and Right Sides). Priced Each. Replaces Minuteman Power Boss 303057, 3302057. Our Part Number PB 3302057