Megatouch Slim Maxx or Force Radion Coin Mech Sensor
This is a Coin Mech sensor for Megatouch games. It was used in the Slim/Select Maxx games, the Full/Heavy Maxx games, and the Force Radion games. It is the part that registers a credit when a quarter is put in the machine. If your machine has stopped giving credits for quarters, there is a good chance that this little thing is the problem!