AD 56407208 Neoprene Disk Squeegee for Nilfisk Advance Priced Each. Fits popular Nilfisk Advance Models such as HydroRetriever 3200, BR 850. 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.. Measures 28" x 5 1/3". Replaces Nilfisk Advance 56407208. Our Part Number AD 56407208