Ink jet printer is generally used in disposable cartridges with a chip, flow control cartridge is composed of a computer driven by a small plastic ball to complete the PP driver, PP plastic ball is non-toxic, environmental protection, characteristics, light weight, both the original cartridge or cartridges installed inside are equipped with PP plastic ball, plastic ball is generally used in standard of 3.964mm, the general black cartridge will be using a PP plastic ball, how is the color cartridge will use three PP plastic ball, due to the ink flow control should be very accurate, so the requirements for very high plastic PP ball precision, requires less than 0.01mm +, at present you can do this precision plastic ball manufacturers rarely, of 3.964PP plastic ball Dongguan Jiaji plastic products Co. Ltd production has been applied to a variety of domestic and foreign printer cartridges. , product quality has reached the same technical level of foreign imports of plastic ball.