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 16-VQFN.
HRF-AT4511-FL-TR Features
HRF-AT4511-FL-TR Applications
There are a lot of Honeywell Aerospace HRF-AT4511-FL-TR Attenuators applications.