Phoenix Contact 0831205 The wire marking sheet can be labeled with various options including TOPMARK NEO, THERMOMARK PRIME and others; it is typically yellow in color and comes unlabeled, but can be identified by its blue mark. The cable diameter range for this product falls between 2 to 2.9 mm and it features a clip-on mounting type, allowing for individual labels with 32 text fields that measure 4mm high and 18mm wide.