Orange QuantX pistons with double collar for 30 and 55 ml cartridges.
Pack of 20 pcs

They are designed for low viscosity fluids. They prevent the contents of the cartridge from spilling inside the dispenser in case of accidental reversal.
At the same time, the small hole in the piston allows the vacuum to be turned on so that the medium does not drip when it is not being dosed.

They distribute air pressure evenly and prevent leakage of media over the piston.
Made of polyethylene.