The Whitehead Gag is ideal for keeping the mouth as wide open as you like. It works on an adjustable system, so it is easy to adjust. The Whitehead Gag is stainless steel and rubberized to protect the wearer from chipping tooth enamel during prolonged wear. When the Whitehead Mouthgag is fully open, it has perfect access to the mouth.
The maximum length is 56 cm. The diameter of the Whitehead Mouthgag is 11.5 cm / maximum height is 6.5 cm