45mm

The warning label is scary at first, but this 45mm fits perfectly and feels sturdy enough for daily use. I've had it for two weeks and it's held up great, so the BPA thing doesn't bother me much.

Honestly, I was a little wary of the BPA warning at first, but the 45mm is exactly what I needed for my setup. The polycarbonate build feels sturdy enough for daily use, and it’s held up without any issues so far.

The 45mm fits perfectly and feels solid, and the size is exactly what I needed for my setup. It arrived quickly and has held up well in daily use, so I'm glad I went with this one.