This is a replacement Arrma Kraton 8s BLX Servo Saver Plastic Parts Set, intended for use with the 8s-BLX Kraton kit.
 
Features:
Strong composite material for long-lasting durability in all conditions - 
Precision molded parts for consistent fit and smooth operation - 
Includes a selection of servo horn inserts to fit various servo spline sizes (15T and 17T)
Includes:
(1) Servo Saver Horn
(1) Servo Saver Ramp
(1) Servo Saver Locking Plug
(1) 15T Servo Saver Spline Insert
(1) 17T Servo Saver Spline Insert