Set of 3 Cylinders
A set of 3 cylinders for use with standard vacuum pumps (sold separately).
Beginner: 2.75 inches in length (not including tip), 0.625 inch inner opening diameter
Intermediate: 2.875 inches in length (not including tip), 0.75 inch inner opening diameter
Advanced: 3.125 inches in length (not including tip), 0.875 inch inner opening diameter.
Once a cylinder has been put in place and air has been pumped out of it, the pump can be removed, but the cylinder will stay vacuum sealed. This allows the user to wear the cylinder for extended lengths of time.
Increased blood flow increases sensitivity and stimulates growth. Some guys have reported significant gains in size by pumping consistently over time, and even many surgeons who perform metoidioplasty recommend pumping. It is interesting to note that some guys put a sleeve over the cylinder and have sex, without the need for a strap-on.
Manufactured by Size Matters.