This is a replacement set of two Arrma 8S-BLX 18mm Pivot Ball , intended for use with 8s-BLX Kraton kits.
 
Features:
Strong and durable steel for long-lasting performance in all conditions
Precision manufactured for consistent operation and fast servicing
Specifications:
Hex Socket: 6mm
Ball Diameter: 18mm
Thread Diameter: 8mm
Thread Length: 25mm
 
Includes:
(2) 18mm Pivot Ball M8 x 25mm