Enjoy powerful suction with this triple set of deviously sized suction cylinders. Simply apply to any area that would benefit from increased sensitivity and blood flow, no pumps or accessories needed. These self-contained ABS suction devices work with a simple twist for a powerful grip. Lubed internally for smooth movement and a strong seal that makes for a memorable sucking session. Opening is 0.75 in. diameter, tube is 2.35 in. long and entire item is 4 in. long.