This is a replacement Arrma 8S-BLX Gearbox Case Set, intended for use with 8S-BLX Kraton kits.
 
Features:
Tough composite material for long-lasting durability and increased crash resistance
Steel input sleeve for precision fit and increased bearing durability 
Molded 'ARRMA' livery for cool looks and quality assurance
Precision manufactured for consistent screw fit and servicing
Includes:
(1) Gearbox Case
(1) Gearbox Cover
(1) Sway Bar Holder