This is the return spring for ESD coin mechanisms.
When the mechanism is pressed in to deposit coins, this is the spring which pulls the mechanism back out.
ESD Return Spring - Set of 12 This is the return spring for ESD coin mechanisms. When the mechanism is pressed in to deposit coins, this is the spring which pulls the mechanism back out. If your mechanism is not returning back out properly, it is most likely the spring. Replace it with this high-quality part!