Use this pump to increase sensation and sensitivity on your vulva. Place on the vulva and squeeze the hand pump to draw blood into the area. You will feel suction which increases temporarily in size and sensitivity. There is a nub that puts pressure on the clit as the suction increases. You can easily release the pressure by pressing the easy release valve on the bulb. Savour the unique sensations of suction with this simple pumping system. The black silicone part that touches your body is removable for cleaning. Made of 100% silicone and ABS plastic. Cup is 3.2" (8.1 cm) long.