Pneumatic Badge Machine Button Maker Round Badge Making with 44mm Mold 110V-220V. It's easy to make your own professional quality pinback metal buttons quickly and affordably! The machine is simple to operate. 25/32/37/44/50/56/58/75mm diameter of the mold can be arbitrary switching. Product size: 30 cm 12 cm 40 cm.Some Suggestions about the selection of pump. Use over 40 L volume. When you use the machine in the family, please choose the mute pump. The pump pressure not less than Seven.