It is made of three pieces (magnetically attach) of acrylic. 5mm, 8mm, 5mm. The 8mm is the maximum thickness that will fit (thickness of 4 nickels stacked).
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It is made of three pieces (magnetically attach) of acrylic. 5mm, 8mm, 5mm. The 8mm is the maximum thickness that will fit (thickness of 4 nickels stacked).