Dr. Joel Kaplan's enlargement pump systems are the #1 recommended penis pumps by doctors and sexual wellness experts for erection health and enlargement. This heavy duty, metal vacuum pump is built to last. Compatible with all of Dr. Joel Kaplan's pump systems, this pump is the preferred choice for serious pumpers. The medical grade acrylic cylinders are sleeve free and specially sized to allow maximum blood flow to the penis, giving you the biggest and hardest erections you ever had. As you pump, you will see yourself get bigger and harder immediately. <br /><br />For permanent size gains, Dr. Kaplan includes his copyrighted, proven enlargement program that is guaranteed to increase your erection size up to 3 inches in length and 25% in thickness. All of Dr. Joel Kaplan's pumps & cylinders are interchangeable, so you can buy the next cylinder size up when you outgrow their current size. The pump safety gauge allows the user to track the pressure and follow Dr. Joel Kaplan's proven enlargement program with ease. Nearly 100% of Dr. Joel Kaplan's Enlargement Pump users report increased rates of sexual arousal, intimacy, sexual performance and confidence.<br /><br /> Dr. Joel Kaplan's Enlargement Pump System also includes KaplanCare Customer Service to ensure that you have access to our hassle free product warranty and get the product support you deserve. What is included: Metal Hand Pump, Pressure Gauge, First Expansion, Cylinder Leather Strap, Instruction Book. 1 Year Warranty.<br />9" cylinder length. 2.25" diameter of the cylinder opening.