Hot stuff. 
RG bike tuning parts. TPU 3D printing. 
Finally almost unbreakable. All parts are available here: 
https://bikeboost.at/Parts-RG-c157371541
1.) Lipo holder (rubber). 3D printed from flexible TPU.
Very elastic and break-resistant. Color: Black.
Suitable for RG-Evolution 1:5 Sale: https://bikeboost.at/Parts-RG-Lipo-Halterung-p595211236
2.) Receiver box with air inlet. (rubber). 3D printed from flexible TPU.
Very elastic and break-resistant. Color: Black.
Suitable for RG-Evolution 1:5 Sale: https://bikeboost.at/Parts-RG-Empf%C3%A4ngerbox-mit…
3.) Rear wheel protection (rubber). 3D printed from flexible TPU.
Very elastic and break-resistant. Color: Black.
Suitable for RG-Evolution 1:5 Sale: https://bikeboost.at/Parts-RG-Hinterrad-Schutz-p595320363
Source : bike boots