White BMP51/BMP53 Polyester Tissue Cassette Label. Tissue Cassette Polyester (B-482) is designed for tissue cassette labeling and identification in conjunction with the BSP™31 Label Attachment System from Brady®. When printed with Brady® Series R6400 ribbon, this material has superior resistance to processing fluids and conditions. Matte white polyester material has a permanent acrylic adhesive and is thermal transfer printable. RoHS compliant to 2005/618/EC MCV amendment to RoHS Directive 2002/95/EC. All-in-one cartridge includes label supply and R6400 Series ribbon.