It says MFS 474K 250V. It is on a dial-up PCI card.
.47 uF 250V capacitor. I'm guessing it is there to protect from spikes from the high voltage ring tone.
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Thanks I thought it was a capacitor but wasn't sure.
its a mylar capacitor
The OTHER part next to it is a little audio transformer. (the light brown transformer). You can use them to build a ground loop isolator. Just attach your RCA jacks to the input and other rca jack to the output... and you have a ground isolator. Usefull to eliminate hum in audio when interconnecting some devices to other devices.
that particular piece would be called a capacitor i believe. i forget what type it is though