This is a replacement for the shock cap cover on ARRMA 6s models. You will need to print a Cover and Washer for each shock. I recommend printing solid in PC, PA, ABS, PETG, or TPU. Avoid PLA at all costs as it will crack with any impact. To assemble, you will need an M3x25mm bolt along with an M3 nut. Put the bolt through the shock tower like the original and then slide on the cover with the flat side facing the tower. Place the shock cap into the gap of the cover and then put the washer on the screw. Put the nut on the bolt and tighten it.