BrainwavzEarpad Adapter Ring for 580, 600 & 650 Sennheiser Headphones, for use with Brainwavz Oval & Angled Earpads

As others mentioned, these are fairly poorly 3D printed. Tolerances are bad and material is extremely brittle. I purchased for HD6XX's knowing this would likely be the case.Mine had no chance of fitting out of the box. I spent a few minutes filing out the printing inconsistencies and still had no luck. 30 minutes gently sanding with a Dremel and they snapped on snugly.I very carefully attached the pads, unfortunately when done the tension from the pads flexed the rings open a tiny bit further and they were now too loose for the ear-cups. One layer of electrical tape around the inner bezel fixed this and they now pop on and off gently but securely.Overall good result but frustrating getting there. If you are planning on purchasing be prepared to take your time with a little DIY.PS: I used these to fit Brainwavz micro-suede pads to HD6XX's. The pads themselves are great, a good comfort upgrade over stock and don't seem do to anything weird to the sound.

The outer ring is too large, can hardly get the earpads on.Inner ring is just too small to even put it on the headphones... Don't buy!

These are the only way to attach your Brainwavz ear cups and they are completely hopeless i have gone though 6 just trying to fit them to the headset not impressed one bit. So be warned be prepared to buy multiple sets if you intend to use them. And god forbid you have to remove them

Terrible didn't work at all with hd650. There 3d printed and broke within 5 seconds of being out the packaging. DO NOT BUY

Cheap plastic that snapped instantly with the slight pressure required to install.

It will cost a little more and you'll have to deal with the delivery time but Modhouse exist only to make things to alter headphones.