Black Plastic Chip Tray 100

What is the quality of metal chip tray scanning camera? Is the signal of the camera to analyzer not so good as plastic holder device?
We have different chip holder scanning camera to suit for different distance between the scanner to barcode cards requirement for Texas Holdem and Omaha poker game winner analyzer. The chip tray scanner plays an important role in helping the poker player to know the winner of the cards playing game in an efficient way.