Frequent cleaning and sanitation of floor drains reduces the possibility of finished product contamination. The tough polypropylene bristles and nonabsorbent plastic block will help you fight bacterial contamination. Color-codedblack bristles help sanitation personnel keep the brush segregated to avoid cross-contamination. Available in four diameters. Handle not included. Only use White or Black Floor Drain Handles imprinted with "Use for Floor Drain Only" in English and Spanish. Use handles only with floor drain brushes that have SKU numbers that begin with 618-xxxx.