Wago 6mm double deck terminal block awg 28 12 281 series wago 281 636281 488 wago 281 636281 488 6mm wide double deck 2 diode 250v terminal block colour grey for wire sizes awg 28 12 pack size 50 wago 281 636281 488 6mm double deck 2 diode 250v trm block grey awg 28 12 50pk