Enjoy incredible suction with maximum returns with this simple to use pump that yields impressive results The stretchy sleeve at the base is tapered internally to provide a snug and secure fit on practically any size, ensuring a strong seal for plenty of suction Just attach the hose, pump, and watch yourself grow. Comes with measurements marked on the side so you can mark your progress Measurements: 9 inches in length, 1.75 inches inner diameter. Material: ABS plastic and rubber. Color: Clear