Are there any 3.5mm audio extensions that won't disable the microphone feature on my earpods?

I have an iMac with a single 3.5mm audio/mic combo input. I also have the apple earpods so the mic on the earpods will be used instead of the built in mic on the iMac when it is plugged in. However, the cable on my earpods are not enough and i was wondering if there would be a 3.5mm audio extension that does not cancel the mic usability on my earpods!