A-18236-AI SUB TO 22252One New Aftermarket SUB TO 22252 Double V belts or hexagonal belts, can be explained as two v belts joined back to back. The neutral axis containing the tension cord is exactly half way up the section. Hexagonal belts are used where several pulleys in the same plane are to be driven in the clockwise and counter clockwise direction simultaneously. The polyester tension cord placed at the center of the construction provides the belt extreme flexibility