The spa pump capacitors provide the necessary power for the starting of the pumps. You will find here a complete range of capacitors compatible with any pump. You just need to identify the power indicated in uF on your defective capacitor and to report this measure to the capacitors we offer. Only the capacity is important (at + or – 5%). The dimensions can vary from one manufacturer to another. Most of the time, the assembly of a capacitor of the same capacity on a spa pump with a lightly different size doesn't create any problem. Make sure to check the dimensions of your capacitor if it is not situated in a place with precise dimensions.