Wago wsb quick marking system for terminal block 5 175mm alphabetic 249 series wago 249 553000 002 wago 249 553000 002 wsb quick marking system for terminal block width 5 175mm horizontal marked kl 50 each 10 strips with 10 markers per card same letterssymbols each strip yellow wago 249 553000 002 wsb quick marking system for terminal block kl yellow 5pk