The 50-63 mfd Start Capacitor is usually found in emerson smooth body pumps as well as aquaflo models.

picture may differ from actual make and model supplied values remain the same

Dimensions:

Main Body Length: 100 mm (Without Cap) 120 mm (Inc. Cap)
Diameter: 50 mm

Volts: 450 vac

Uf or MFD: 50-63