This is a start capacitor for compressor motor. 110 Volt 60 HZ Capacitor Range is 145-175. It reads on it: Philips 3535B2A0145A110A2 #35F1478BA9 #3629503 It is a bakelite case measuring 3-1/4" long and is 1-1/4" in diameter. It has quick connect terminals with the leads already installed. These are new old stock from the Cavalier Corporation. While supplies last. Can be used on many machines.