34 Series indoor letter label. 3420-B Letter B self-sticking vinyl cloth for fast general purpose indoor marking requirements. Permanent or temporary markers for bins, shelves, poles, panels, switches, equipment, wire, cable, and general identification numbers, letters and conduit and voltage markers. The label is black on yellow color. 3/4" Height, 9/16" Width with a character Height of 5/8". Thermal transfer print technology, coated vinyl cloth material, semi-gloss white, yellow color and orange finish and repositionable rubber based adhesive. Recommended ribbons white - material are Brady Series R6200 (Brady Series R4300 and R6000 ribbons also acceptable). Regulatory/agency approvals for UL. B-498 is a UL Recognized Component to UL969 Labeling and Marking Standard when printed with Brady Series R6200 ribbon. See UL file MH17154 for specific details. UL information can be accessed online at UL.com. Search in Certifications area. Brady B-498 is RoHS compliant to 2005/618/EC MCV amendment to RoHS Directive 2002/95/EC. The adhesive and cloth backing give excellent holding power, yet allow for clean removal and repositioning.