Pump Start CapacitorVolume: 50-60 mfd uFOverview Size: 2.75"(70 mm) height x 1.45"(36 mm) diameterNet Weight: 2 ozCommon Remarks:1.Not worry about this round capacitor installing, most are fixed with nylon ties or press-fixed with one bent steel pin2.There are 1 start capacitor and 1 run capacitor together inside well pump control box3.Normaly well pump run capacitor is CBB60(plastic shell) capacitor or CBB65(Aluminium Shell) capacitor,advise to use CBB65 capacitor for better heat dissipation and stability4.Start capacitor only used once during motor starts, then the run capacitor take into running