This is a front and rear pair of TPU bumper supports to help reduce impact to the Mini MAXX chassis, and to keep the bumper out where it should be.
 
This is printed in 95A TPU with just enough infill to keep flexibilty but plenty of support. Both front and rear pieces snap in firmly from the top. You will feel it pop in when properly installed. this tolerance is tight so it won't pop out upon impact.
 
The factory support, shock mounts and body mount are 1 piece and the whole thing would need replaced if damaged. This will reduce the risk of needing to replace.
 
Please let me know if you have any questions.