This is a replacement Arrma Rear Lower Chassis Brace, intended for use with the 8S-BLX Kraton kit.
 
Features:
Manufactured from strong and lightweight aluminum
Precision manufactured screw holes for fast and easy servicing
Black anodized for cool looks and increased durability
Fixing screws included
Includes:
(1) Aluminum Rear Lower Chassis Brace
(4) M5 x 12mm Button Head Screw