Label holder (30 x 50 mm) and labels Metal label-holder designed for the Harmony XB4 range. Label holder 30 x 50 mm. Labels 18 x 27 mm. ref. Manufacturer Label colour Standard label holder ZBZ33 without ZBY6101 Red / Black ZBY6102 White / Yellow Flush bezel label holder ZBZ35 without Labels ZBY5101 Red / Black ZBY5102 White / Yellow Schneider Electric ZB4-B & XB4-B Harmony® 22mm Range