Designed exclusively for LEM. These heavy duty dual gear stuffers are the best you can buy. The huge drive gear, notched piston rod and hard carbon steel gears are built to deliver and withstand the pressure needed to stuff even the small sausages. Four solid stainless steel bars create a sturdy frame that won"t bend or bow under pressure. Two speed design: high speed raises the piston quickly for filling the cylinder, low speed is for stuffing casings. Air release valve in piston ensures even pressure and better results. Heavy-Duty rubber gasket seals the cylinder to prevent leaks.