HPI servo arm set is constructed on a black plastic parts tree and has 12 different parts on it for the Micro RS4. When removing parts from the part tree, trim excess off, this will let the part fit correctly on the car.

INCLUDES: #1-Front Diff Housing
#2-Wrench
#3-Ends from Diff
#4-Part of u-joint
#5-Sterring Column
#6-Inner housing for diff
#7-Part of u-joint, goes with part #4.
#8-Control Arm (long) for (Acoms, Airtronics, HPI-SX1, JR, KO Sanwa)
#9-Control Arm (long) for Hitec.
#10-Control Arm (long) for FUTABA.
#11-Part of rear shock
#12-Control arm (short) for Acoms, Airtronics, HPI-SX1, Jr, KO Sanwa.
#13-Control arm (short) for Hitec.
#14-Control arm (short) for FUTABA
One Plastic bag with 3-steel pins and a steering flange pipe that goes with part #5.

Mounting onto the HPI MICRO RS4.