2Sets Anti Dust Plug for FiiO M17 Music Player 4.4MM 3.5MM 2.5MM Type C Jack (Pack of 2)

Got this for Sony a306 and Fiio Q3. Fits the ports well. No complaints.

I have a couple of Astell&Kern players that have the 4.4mm penticon output for truly balanced headphones. Unfortunately, I can’t find any source of just the 4.4mm plugs in a larger quantity. It’s the one that gets lost the most and I have larger packs of the other connectors. I’m a huge fan of plugging these connections up when they are not being used. Dust works its way into the open socket and dust is not ideal when it comes to electronics as it has conductive properties and can kill your player or laptop. I have plugged off all of the unused inputs and outputs on all of my MacBook Pro laptops, my iPads, and iPhones. I also use Audioquest plugs on my Surround Sound system and I plug every single unused input or output on all of my electronic devices.

These work as anticipated. Not much else to say...

These fit super well. The 2.5mm one is a bit snug but otherwise fits just fine. I live in a crazy dusty area so something like this is super helpful to have. (The flat looking plug is the one what came with the m17). I’ve seen reviews on other similar items concerned about the plugs falling into the socket. No concerns like that with these!