All cylinders are handmade of medical-grade industrial strenght clear acrylic.
They are made out of 1 piece without a seem.
They are easy to clean and will not crack.
They all have an air valve which allows disconnecting from the pump without loosing the pressure.
Price per pair.
Choose between 2 sizes, 15 or 22 mm. internal diameter.
Use a lubricant at the bottom of the cylinder to get a better vacuum.
To use 2 nipple cylinders at the same time you need the 2-way buddy connector (BG57) which you can order below.