Just a 12 volt flasher unit. You should be able to pick one up at any auto parts store. I don't have the part number for the flashers I'm using, but you don't really need one.
Well, I just like to know parts numbers when possible for the following reasons.
1.) I live quite a long ways from the nearest parts store. Knowing the right part before I get there saves me time while I'm there and saves me from making return trips with parts that don't fit.
2.) The guys working at the local parts store are becomming less and less knowledgeable. Most are young punks more interested in ground effect lighting, spinner wheels and cool looking graphics then in actually knowing how to have a good running functional vehicle.
Anyway, I just wanted to find out if there any other flashers that worked well. I like to keep my bunker well equipped.

Plus, you never know when something is going to go south on you while you're on a road trip. It's nice to know the parts so you can pick one up at whatever local place might be available.
Regards,
DiscoEd