4.5"x6" Pro. Series 2-Stage Monster cylinders, designed to take your penis pumping to next level without boundaries. Originally developed by Pro-Pumpers, the 2-Stage Monster cock and balls cylinders will help you to get your cock and balls (scrotum) to a much larger size, with proven result.
How To Choose Your Boston Pump 2-Stage Cylinder? The 2-Stage cylinders are offered in 4 different groups: The Starter, The Intermediate, The Advanced and The Pro Series. Please refer to each group and choose each stage carefully. You always need 2 sizes for your 2-Stage.
Entry Size: Is the opening which must be the size of your balls and your penis together. Please refer to "How To Measure" page to get more info.
Chamber Size: It is usually a fixed size. This part should be large enough (not too large that it is hard to carry) to have room for you to grow, expand and build good suction, yet not too small to get pinched. It is best to let your desire do the job.
The total length of all BostonPump's 2Stages is 10". The Entry Size or the 1st stage is 1.5" and the Chamber or the 2nd stage is 8.5" long. All the measurements are (+- 1/8").
Yes, We Can Customize Contact Us Here
-All BostonPump.com cylinders are plug and pump ready, equipped with state-of-the-art quick-disconnect couplings and growth indicator.
-Fully hand-crafted and hand-polished in U.S.A.
-Sold with 30 days limited manufacturer’s warranty.
-Always measure yourself carefully before ordering. No return or exchange of 2-stage cylinder with wrong size even if the seal is not broken...HOW DO I MEASURE PAGE
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Things You Must Know Before Placing Your Order Enter Here
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