The Gachinko Expander Penis Pump is a manual cock enlarger vacuum tube for getting you bigger and harder than ever. Slip on one of the cups (there are three included, each with a different diameter) and then slide yourself through into the tube. Then gradually remove the air from the tube using the manual pump and watch the effect this has on your penis as the blood flow increases! The see-through tube means you don't miss anything! Combine with a constriction ring around the base of your penis to help maintain your impressive erection after removing yourself from the pump, and then you're ready for action.
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