The UD-12107 from ARC Technologies, Inc. is a Microwave Absorber with Frequency 12 GHz, Insertion Loss -8 dB, Thickness 0.030” ± 0.005”, 0.762mm ± 0.127mm, Thickness 0.030” ± 0.005”, Thickness (mm) 0.762mm ± 0.127mm. More details for UD-12107 can be seen below.