Recommended for very experienced players only, the Vac-U-Lock(TM) Dual Density Extreme Set offers deeper penetration and more intense feelings of fullness than any other complete Vac-U-Lock(TM) set with three extra-large attachments in dual density ULTRASKYN(TM), complete harness with removable o-rings and plug, and a bottle of Mood water-based lube. Measuring 10.5 inches, 12 inches, and an incredible 15.5 inches, these dual density attachments warm to body temperature with use and feature a soft, pliable exterior that gives way to a firm inner core, recreating the feel of a real erect penis. Attachments can be used with the harness, the included Vac-U-Lock(TM) suction cup and Knuckle-Up accessories, and any other accessory or harness in the line. The Vac-U-Lock(TM) Dual Density Extreme Set also includes Doc Johnson(R) Natural Toy Cleaner and ULTRASKYN(TM) Refresh Powder to properly and hygienically maintain your dual density ULTRASKYN(TM) attachments. Every product in the patented Vac-U-Lock(TM) system is designed to help you create any strap-on or toy you're in the mood for, and it's as simple as popping on the attachment of your choice. From Doc Johnson.