Wago wsb quick marking system for terminal block 5 175mm alphanumeric 249 ser wago 249 618 wago 249 618 wsb quick marking system for terminal block width 5 175mm vertical marked f31 f40 10ea 10 strips with 10 markers per card white wago 249 618 wsb marking system for terminal block 5 175mm f31 f40 white 5pk