I need to order some optical flats for the experiment.

The orchestra tuned their instruments to the E flats.

The real estate agent took us to see several show flats in the new development.

I have two C-flats in my music collection.

The orchestra tuned their instruments to the D-flats.

The orchestra tuned their instruments to the B-flats.

I can hear the G flats in the music.

I live in the f flats.

I saw several c-flats while walking through the neighborhood.

I can hear the D flats in the music.