White nylon plastic with a matte finish and slight grainy feel.
About this Product
Smoke stacks to replace the rubber ones in the Leader Class Optimus Prime figures. Simply remove the rubber ones and insert these.
Note: please make sure that you've done any painting/effects to these before install. The Strong & Flexible material won't take several installs and removals. I've opened up additional materials, however, please be aware that only WSF has been tested.