The JCPC (Jim Cielinski PlastiC) is a pedal from the BMX company Odyssey (www.odysseybmx.com) and design/invented by George French from G-sport (www.gsportbmx.com), part of odyssey.
It is a plastic version of the original Jim cielencki pedal, a freestyle bmx rider who rides for the pro team of odyssey, and is world wide recognized by bmx riders for his pedal grinds.
What makes this pedal so special, is that it exists out of 2 plastic halves around a metal spindle that acts as a bearing for the whole pedal. the screws that hold both halves together are also the pins that provide grip to the pedal. and the best part, if you grind threw 1 side, you can just buy plastic halves and don't need to buy 2 new pedals.
The design i did does not have the concave for as the original, but is flat, so you have more space to grind on, and allows you to easy add a piece of aluminium or steel on the bottom of your pedal. (or titanium if you want sparks!)
update: I tried them at the skatepark and they work perfect, they hold up even when crashing. i then tried to brake them while grinding on them, and i was unable to. after a 4 hour session they still worked perfect.
first, the JCPC pedal has a patent:
odyssey owns all the rights to this, and it should stay this way.
i drew the pedal in sketchup by measuring one, but since this is a copyright product i will not provide that drawing here, just the stl file for you to print.
so if you want one from yourself, buy a set of their pedals, and print your own half to fit on them.
if someone asks you to print this, and wants to pay you for it, explain them why you can't do this. they can buy 2 real replacements for about $7 in bmx shops
(google JCPC pedal to find shops to get them from)
if you have trouble with bridging you can print it upside down, but that you will end up with less grip on the pedal.