On Wednesday, April 13, 2016 at 7:32:20 PM UTC-7, wrote:
I have a Trig TT21 transponder for sale. It is new in the box never installed. Has wiring harness and remote head. I need one that will fit in a conventional radio stack for my RV6. $1800.00 (618) 977-9063

If it's still available, I'll take it.