The bladder press was designed to improve the traditional wooden-basket ratchet-style press. A rubber bladder expands from the stem outward using water pressure- pressing the fruit against the sides of the cage. This style of pressing is much more subtle and softer on the fruit, not allowing bitter tannins to be extracted from cracked seeds. This is also a more efficient method of pressing- cutting the cycle down to less than half the time a ratchet-style press would take. Water is recommended to inflate the press rather than air. No more than 30psi is needed for most fruits. Comes with a stainless cage, painted lid and basin, along with mesh liner and plastic splash guard. Drain pipe, pressure release valve and pressure gauge all included. Cage dimensions: 13.4 inch x 18.9 inch. Capacity: 40 liters/10.57 gallons. Overall dimensions: 25.6 inch x 38.6 inch. Weight: 44lbs.