Neckjet Pillow, 2009 To Current Caldera Spa. Mounting holes on back of pillows
Dimensions 4" inside/between the holes 4-7/8" outside/between the holes
*** THE MANUFACTURE RECOMMENDS TO SOAK THE PILLOWS IN HOT WATER THE MAKE THE PILLOW SOFT, SO THEY MOLD TO THE SPA BETTER. WARRANTY ENDS AFTER INSTALLATION PER THE MANUFACTURE. ******