Our 100 Series Coin Acceptors are made of durable metal construction. We manufacture them to accept a wide variety of coins or tokens from all over the world. They are industry standard size 3-1/2" x 4". Because these coin mechanisms rely on gravity, the maximum degree of angle at which they will work properly is 3 degrees. We recommend Molykote or similar lithium grease as a lubricant. Watch a YouTube video on our coin acceptors here: www.youtube.com/watch?v=P4t-zKjogI4