HERE ARE MIDWEST OPTICAL MIDOPT BP660-25.4 C-MOUNT, BP660-25.5, BP660-27, BP660-30.5, BP660-34, BP660-35.5, BP660-37, BP660-37.5, BP660-40.5 BP660-43, BP660-45, BP660-46, BP660-49, BP660-52, BP660-55, BP660-58 DARK RED BANDPASS FILTERS. NEVER BEEN USED BUT STILL LISTED THEM AS USED. LET ME KNOW IF THERE IS A SIZE OR OTHER QUANTITY YOU NEED THAT'S NOT LISTED AND I'LL CHECK TO SEE IF I HAVE IT.
FILTER SIZE: M25.4, M25.5, M27, M30.5, M34, M35.5, M37, M37.5, M40.5, M43, M45, M46, M49, M52, M55, M58 & M62
SPECTRAL RANGE: 640-680nm
FWHM: 65nm
TOLERANCE: +/- 10 nm
MIN. PEAK TRANSMISSION: >90%
SURFACE QUALITY: 60/40
https://midopt.com/filters/bp660/
PLEASE SEE MY OTHER AUCTIONS FOR MORE GREAT DEALS!