Phoenix Contatc Marker for terminal blocks, Roll, white, unlabeled, can be labeled with: THERMOMARK ROLL 2.0, THERMOMARK ROLL, THERMOMARK ROLL X1, THERMOMARK ROLLMASTER 300/600, THERMOMARK X1.2, mounting type: snap into universal marker groove, snap into flat marker groove, for terminal block width: 50000 mm, lettering field size: 6.2 x 50,000 mm, Number of individual labels: 1