The Apollo Trainer Kit can really help pump up your training routine! This penis pump can help with blood flow to the penis, harder and more full erections and enhance the quality of your sex. It is made of a durable cylinder with universal measurements. The silicone sleeve adds a superior suction seal and has ribbed textures for added sensations. The easy squeeze bulb has a quick air release valve to help ensure safety when using this product. Read all instructions before using and consult your doctor before use with any questions you might have.