An optical filteringelectromagnetic screening structure for being joined to at least one transparent substrate, especially made of glass. The main tube has a slot at one end and a detent proximate to the slot. That server consist of a CPU, memory, a data storage device, a communication interface, a clock, an operating system, and an auction program. The at least one resilient lock plate releasably abuts against the end wall of the chassis to prevent the frame sliding out of the chassis.