The ABS-NBSE from ABS Technics is a Microwave Absorber with Absorption -20 dB, Frequency 1 to 26 GHz, Attenuation -20 dB(Reflectivity level), Thickness 0.03 to 0.15 Inch / 1 to 5 mm, Thickness 0.03 to 0.15 Inch. Tags: Tuned Frequency Absorber. More details for ABS-NBSE can be seen below.