This machine is for feeding the top pins or bottom pins into tubes. Normally, a coil of tube is 100M long. If there are more than 20 bowl feeders in an assembly machine, the machine will vibrates. To avoid this, customers needs this pins in tube machine to pre-loading pins into a coil of tube. Several codes of pins can share one bowl for feeding into tubes. When the tubes are full of the pins, an operator puts the coil of pins on the assembling machine.