10-section, horizontally labeled with the consecutive numbers 11 to 20|All of the terminal points on the clip line complete system terminal blocks have generous sized labeling options|This is a precondition for clear wiring and simplifies tracing during testing and maintenance work|The ZB marking system provides logical and clear identification of modular terminal blocks and interface modules|The 10 section ZB marker strip can be divided conveniently at any point|Easy to apply (push into grooves of terminal block)|Special marker sheets are also available per customer specifications