Acrylic ConstrictionChoose an internal diameter for the constriction (30mm or 35mm constriction for 40mm tubes 40mm or 45mm constriction for 50mm tubes). For use only with the See through Constriction SPT and the Electro Cylinder SPT

The size refers to the internal diameter of the acrylic tube

Cable connection point for 4mm banana jack on polished comfort ring at base of the cylinder

The cylinders have space inside to allow some ’tug & pull’

Electrode for use ONLY with the fully-lined electro SPT

This focuses sensation and enlargement on the head of the penis

Venus 2000 users:

This SPT has an adjustable telescopic length to position the electrode just where you need it

Vacuum gauge

The insertion depth of 105mm

4mm banana jacks that will connect to any SeriousKit device

The head of the penis is drawn through the constriction with each pulsation of the milker

You can do this before or after you purchase