This curved headrest has two fixing pins, which fit into the slots provided on your spa shell. You can also use suction cups.
Several brands of hot tub use this headrest, including Volition.
The headrests can react badly when the chlorine level in your spa is too high (above 3 ppm), Tubs Parts recommends that you remove them when not in use.
Length: 290 mm
Height: 95 mm
Distance between the center of the fixing points : 190 mm