An enclosure of Tape & Reel (TR) is used to package the optical attenuator.Packed in 0805 (2012 Metric), the RF Attenuator is convenient for shipping overseas.
E-TA2012 T 5DB N3 Features
E-TA2012 T 5DB N3 Applications
There are a lot of Nidec Copal Electronics E-TA2012 T 5DB N3 Attenuators applications.