An enclosure of Tape & Reel (TR) is used to package the optical attenuator.The RF Attenuator comes in 0805 (2012 Metric) packaging, which makes it convenient to ship overseas.
E-TA2012 T 1DB N7 Features
E-TA2012 T 1DB N7 Applications
There are a lot of Nidec Copal Electronics E-TA2012 T 1DB N7 Attenuators applications.