The 5780-C5G from Holland Shielding Systems is a Microwave Absorber with Frequency 500 MHz to 6 GHz, Thickness 0.03/0.05/0.07/0.09/0.11 Inch/1.0/1.5/2.0/2.5/3.0 mm, Thickness 0.03 / 0.05 / 0.07 / 0.09 / 0.11 Inch, Thickness (mm) 1.0 / 1.5 / 2.0 / 2.5 / 3.0 mm, Magnetic Permiablitity 4.3 µ’. Tags: EMI Absorber. More details for 5780-C5G can be seen below.