Wago wsb quick marking system for terminal block function labels 249 series wago 249 674 wago 249 674 wsb quick marking system for terminal block width 5 175mm vertical marked u v w n pe u v w n pe 10ea 10 strips with 10 markers per card consecutive letterssymbols each strip white wago 249 674 wsb marking system for terminal block 5 175mm u v w n pe white 5pk