Aluminum oxide, rubycon capacitors, Audio capacitors, electrolytic capacitor

 EEE FK Series 63 V 470 uF Ø16 x 16.5 mm 105°C Aluminum Electrolytic Capacitor

https://www.futureelectronics.com/p/passives--capacitors--aluminum-electrolytic-capacitors/eee-fk1j471am-panasonic-9068903