Optical attenuator is packaged in a solid enclosure of Tape & Reel (TR).The RF Attenuator is convenient to ship overseas because it is packed in a 0805 (2012 Metric).
E-TA2012 T 8DB N3 Features
E-TA2012 T 8DB N3 Applications
There are a lot of Nidec Copal Electronics E-TA2012 T 8DB N3 Attenuators applications.