Electrolytic capacitor values, Solid polymer capacitor, audio grade

 EEE-FK Series 50 V 22 uF Ø 6.3 x 5.8 mm 105 °C Low ESR SMT Electrolytic

https://www.futureelectronics.com/p/passives--capacitors--aluminum-electrolytic-capacitors/eee-fk1h220p-panasonic-2028619