An enclosure of Tape & Reel (TR) is used to package the optical attenuator.The RF Attenuator can be shipped overseas conveniently because it is packaged in 0805 (2012 Metric).
E-TA2012 T 8DB N2 Features
E-TA2012 T 8DB N2 Applications
There are a lot of Nidec Copal Electronics E-TA2012 T 8DB N2 Attenuators applications.