DYNAMIC HEADREST INTERFACE, 40LB GAS SPRING RESISTANCE
FOR USE WITH 1/2" SQUARE HEADREST HARDWARE
REQUIRES A SWING-AWAY MOUNTING BASE #92045A (NOT INCLUDED)
PROVIDES STATIC RESISTANCE THROUGHOUT EXTENSION VIA 40LB GAS STRUT
USED TO ABSORB AND DIFFUSE TONE DURING HEAD AND NECK EXTENSION
