I bought 8 of these for the back of extend-a-toy... they came to under 400 bucks canadian for all 8 and I got the large 2.5inch ones.. there are 2 different sizes in the rubicon express line.... I believe it is 2 and 2.5 inch... although I havent checked into them for a while, there might be another size....
buy the big ones.. for the 8 dollars more per r.e. joint you may as well for the added strength and size..... unless space doesnt permit..
![](http://img.photobucket.com/albums/v203/Jayp/82%20extend-atoy/R.jpg)