50PCSx SX50-470X 5.5x6mm SURGING Gas Discharge Tube (GDT) #WD1
50PCSx SX51-470X Axial 5.5x6mm SURGING Gas Discharge Tube (GDT) #WD1
50PCSx SX50-75X 5.5x6mm SURGING Gas Discharge Tube (GDT) #SY4