there are 3
1. us spec urathane
2. us spec fiberglass
3. jdm spec fiberglass
** The U.S. BLITZ fiberglass VS the U.S. BLITZ polyurethane bumper:
The fiberglass front is about 1" shorter in height then the urethane front and weighs only 20 lbs - The urethane front weights about 35 - 40lbs.
There isn't an official version of the BLITZ front bumpers for the Celica... this is why you might see several different styles of it in fiberglass. see more here