Krone Kalpasmos Replacement Ear Pads for Bose QC35, Fits QuietComfort 35 ii / QC25 / QC2 / QC15 / Ae2 / Ae2i / Ae2w / SoundTrue & SoundLink(Over-Ear), Memory Foam Cushion with Black L/R Scrims

Q: Will this fit model bh1

Sorry, these do not fit bose model bh1

Q: What are the inner dimensions (the earcup opening) in inches or millimeters?

Hello, the dimensions are: 3.82 x 3.07x0.75,(inches), this is as per the instructions that came with them, I use them on the Bose Soundlink OE2. They are better than the originals, they fit perfectly, you can install them in a couple of minutes. Excellent product!!. I hope that helps.

Q: What are the dimensions of the outer part of the flange?

Do you mean the plastic part of the back? This is the part that plugs into the earphone's groove and holds the earpads in place. Its dimensions are 90mm by 71mm (3.54 by 2.76 inch).