Get ready for larger, thicker erections with Rock Solid's Classic Penis Pump. This clear tube allows you to see your growth with each squeeze of the bulb. Its silicone entry sleeve keeps the pressure in, and its easy-release button gives you the ability to move on to your next endeavor.FeaturesCreates Thicker, Harder ErectionsClear Vacuum Cylinder with Centimeter Markings to Track ProgressSoft Silicone Sleeve for Airtight SealEasy Squeeze Bulb HandleAir Release Button for Fast, Safe RemovalPhthalate-Free, Body-SafeDimensionsTotal Length: 8.75 in. (22.2 cm)Insertable Length: 8 in. (20.3 cm)Unstretched Inner Diameter: 2.75 in. (70 mm)Circumference: 7.75 in. (19.7 cm)