Consists of 2 parts - a base/end piece which fits into end of track and the bumper frame which placed between track and super-glued to base.

Base is loose fit in end of track to allow for variations in printer/resin settings.

Intended for resin 3D printer. May print on FDM, but frame is quite small.

Frame is a remix of https://www.thingiverse.com/thing:4007446 by Anthony Kochevar to compensate for Kato ties and slightly narrower track.