This is an optional Hot Racing Aluminum Chassis Brace 6S/8S Battery Mount, intended for use with 1/8 Arrma Kraton BLX, Notorious BLX, Outcast BLX, Senton BLX, Talion BLX, and Typhon BLX kits. 
Note: To confirm fit - Please check the battery tray part number on your model due to differences in model versions.
 
Features:
CNC machined 6061-T6 aluminum
Adjustable battery cell positions
Accommodates up to two 3S LiPo packs side-by-side, or two 4S LiPo packs stacked
Includes:
(1) aluminum battery tray
(1) Aluminum receiver box mount
(4) battery position braces
(3) battery hook and loop straps
Note:
Replaces associated parts from stock Arrma AR320192 or AR320351
For the Outcast, accommodates the 6S side-by-side format only