Extra Lengths - See-throughAdditional lower lengths are available to help in finding the perfect fit, or for use with multiple players. Additional lower stages complete with liner. Sizing: Internal diameter (40mm or 50mm): The size refers to the internal diameter of the lower section. 40mm is by far the standard size. Due to the way the milker works the sizes are not that critical as long as the penis will fit inside the acrylic tube when erect. Diameter is calculated by

See-though SPT

Polished aluminium caps

If the SPT is unlined and so only has one connection - just connect and close off the valve on the spare hose

or 40mm diameter polished aluminium probe

The length chosen should be the length closest to

The SPT is bi-polar which means it can be used on its own and does not require another electrode to complete the circuit

This is the original SPT – and still the most popular

Constant and pulsating suction is provided by the SeriousKit milker using twin vacuum hoses with valves to control both the intensity and balance between the two types of suction

The Electro SPT is mono-polar and therefore needs another electrode to complete the circuit (such as a probe or self-adhesive e-stim pads)

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This smaller contact area means that for any given setting on an e-stim box the Rod probe will give a stronger sensation than a probe with a larger contact area

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