Green ID lamp lens for ATC600/600A. I have a few extras, so get one now, before they are all gone. The last time I tried to purchase these from IFR, I was told they no longer support the ATC600A product with parts or repair. I do have a stash of these, and I'm willing to part with some for LESS than the last purchase price from Aeroflex, when they were available. These also allegedly fit the gear warning indicator lamps on some models of the Beechcraft King Airs.