Hi Huy Do,
I think I had previously advised you that the trucks in the web link below do belong to the Navistar Used Truck Division.
As for the axle question, the MFS12 is a Meritor non driving single front rated at 12,000lbs axle loading weight.
The D/S E1202W should be a Dana Spicer single front axle rated at the same 12,000lbs.
12,000 or 14,000lb front axles and 40,000Lbd rear tandem axles are standard axle configuration on most all Prostars now days. Most of the Prostars I see are 14,000lb front with 40,000lb rear tandems.
Trust this clarify your question.