https://www.instagram.com/p/BCl9-Dgj...=330_beachbots
The picture doesn't show the other side (there's a hub to interface with the PVC pipe we used as a winch) but it gives an idea of the tooth profile.
Raytheon printed them in Stratasys Ultem as a donation.
Assuming that they were printed completely solid, they would cost an upwards of $100 in material to produce. (each)