12 Inches with 3 Interchangeable Sleeves Created to satisfy the most commanding cocks. 12 full inches of clear cylinder with 3 interchangeable jelly sleeves of various dimension: medium, large and xtra large. Designed for the perfect fit to accommodate the length and girth of the big and well endowed man. Hi-tech pump creates a superb vacuum seal quickly and effortlessly. Includes precision measurement system on cylinder and quick-release valve.