Prepare yourself for bigger, thicker erections with Rock Solid's Beginner Penis Pump. This clear pump allows you to see your growth with each pull of the lever. A quick-release button lets you adjust pressure and get out fast when you're ready to progress to the rest of your play.FeaturesCreates Thicker, Harder ErectionsClear Vacuum Cylinder with Centimeter Markings to Track ProgressSoft Silicone Sleeve for Airtight SealEasy Pull 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)