Is HO Scale EZ track code 100?

Thanks,   I changed the couplers on the engines to the Mark II Long shank and now they make the turn on the regular turn outs some of the time, so I thought I will try a set of #4 turnouts on one of the sidings to see if that will fix the derail problem.

Thanks for the info guys.  A #4 turn out should help my larger engines negotiate the turns onto the sidings 

What is the difference between the HO scale EZ track #'s 4, 5, and 6 turnouts?  The only difference I can see is the length of the turnout?