State-of-the-Art Pump with Three Sized Sleeves. Big Man's Penis Pump has a 12 inch clear cylinder with 2.5 inch width and 3 interchangeable latex sleeves of varied dimension: small, medium and large designed to accommodate the length and girth of a big and long man. High-tech pump creates a superb vacuum seal which works quickly and effortlessly. Penis pump comes with precise measurement system on cylinder and quick release valve. 12 inches long by 2.5 inches wide. Big Man's Penis Pump is for male masturbation and sexual enhancement.