AD 56410373 Tan Gum Rubber Side Skirt Kit for Nilfisk Advance HR3800 / BR1100 Cylinder Brush Model Scrubbers. This kit contains two tan gum rubber side skirt blades, AD 56407447. Each blade measures 19-3/4" x 2" with 5 mounting holes. Fits Nilfisk Advance Hydro-Retriever 3800 and Nilfisk BR 1100 cylinder brush model riding floor scrubbers. Two blade kit required per unit, one side skirt on each side. These blades mount to the side skirt bracket weldment and prevent fluids from escaping from the side of the scrubber. We also offer an oil-resistant kit, AD 56410374 and an oil and chemical resistant black neoprene kit, AD 56410375. These blades will not fit disc brush equipped models, 2042 or BR 1100XL models (use 56410335). Please check your unit before ordering. Priced per set of two blades. Replaces AD 56410373. Our Part Number AD 56410373