De carbon Shocks: MonoTube or Twintube?

I am potentially going to buy a set of four de carbon shocks with 8000 miles that were taken off a 1996 Blazer in 1996 seeing the guy lifted his truck.

Are they monotube or Twin tube.

Anyone know for sure?

http://www.viva-lancia.com/huib/coll/de-carbon.htm

try that link, pretty sure they are monotube.

I am also seeing this page:

http://www.delphiauto.co.uk/DELproductspages14120.asp

I was wondering what was available in 1996.

Hard to tell whether or not I am getting monotube or twin tube.