Size Matters Pull Handle Trigger Penis Pump from XR Brands. 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 8.5 inches insertable length, 2.35 inches in diameter. Silicone opening is .75 inch in diameter, unstretched. Hose is 8.75 inches in length. Material: ABS Plastic, Silicone, PVC. Color Clear.