This high-expansion cylinder is cast of clear Lucite. It is flared outward at the bottom and has a slight inward roll at the opening, which acts as a built-in cock ring and a comfortable seal without messy gaskets. This cylinder also features a state-of-the-art connector or air valve that allows the pump to be disconnected from the expansion cylinder while maintaining the exact pressure you choose. It also features a growth indicator to measure your progress. This "Boston Pump Works Lucite Cylinder" fits basic Boston Pump Works Pump.
Dimensions: 9"L (end to end)
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