Angel Juicer Twin Gears are part of your Angel Juicer. These gears are only available as a set and are made of the high-quality food-grade stainless steel (SUS-304). The gears are suitable for the Angel Juicer 5500, 7500 and 8500. The Twin Gear is also available in a higher quality surgical-grade stainless steel (SUS-316) from which the parts of the Angel Juicer 8500 are made. The function and fit are identical, making both sets of gears suitable for all Angel models. Cold press is performed by triturating with 3 stages of crushing, grinding, squeezing with this twin gears' low speed corn screw. The shattering helical gear technology can crush fibers into fine particles to extract nutrients hidden deep inside of those fiber cells. The marrow extraction available by Angel Juicer Twin Gears only.