An adapter for 2mm acrylic panels to be used in LED Displays that require 4mm Panels . Printed on a Bambulab A1, and P1P. PLA used, no supports required. The finished print is a tight fit into the LED display and the 2mm panel is also a tight fit. This is intentional so that a small bump or jarring will knock anything loose. The display quality between 4mm and 2mm panels is identical ( and the 2mm panels are a little cheaper.)