The ABS-LFE from ABS Technics is a Microwave Absorber with Frequency 0.8 to 12 GHz, Thickness 0.019 to 0.039 Inch / 0.5 to 1 mm, Thickness 0.019 to 0.039 Inch, Thickness (mm) 0.5 to 1 mm, Operating Temperature -40 to 120 Degree C. More details for ABS-LFE can be seen below.