Pump up your penis for a stronger, bigger, and more sensitive erection! This penis pump is easy-to-use with results that will keep you cumming back for more. Slide into the silicone sleeve using a little water-based lube for sleekness. The tight opening will create a seal around your penis so that pressure can build within. The cylinder is textured for a firm grasp, clear so that you can watch yourself grow, and marked with measurements so that you can track your progress! The trigger handle pump is easy to use - just squeeze to build begin the suction process. When you are ready to tap out, press the air-release valve on the flexible hose to quickly reduce pressure within the cylinder. Measurements: Cylinder is 21.6 cm (8.5 inches) insertable length, 6 cm (2.35 inches) in diameter. Silicone opening is 1.9 cm (0.75 inches) in diameter, unstretched. Hose is 22.2 cm (8.75 inches) in length. Material: ABS, silicone, PVC Colour: Clear