This Swedish invention takes most of the weight of a shoulder mounted camera off the shoulder and back, and transfers it to the hips and torso. Our unit is the single shoulder style. It’s really designed to eliminate most of (but not all of) the weight of a shoulder mounted camera. Our unit comes with two gas weight cartridges, good for a maximum of either 26 pounds (typical ENG camera), or 44 pounds (loaded cinema camera). We can change the cartridge for you in about an hour.