All the Power cylinder products on the market now do not have 4 holes. All Power cylinders have 2 holes. The Power cylinder products are all Are the two holes busy receiving Qi? You can use the 2-hole air connection diagram of the Multi-Power cylinder product as a reference to compare with the Multi-Power cylinder you have purchasedCylinder product corresponding to the air connection.
Schematic diagram of connecting the gas pipe to the Power cylinder
