The AFR0000-01 from Concentric Technology Solutions is a Microwave Absorber with Frequency 1 to 18 GHz, Thickness 0.500 Inch/12.8 mm, Thickness 0.500 Inch, Thickness (mm) 12.8 mm, Operating Temperature -51 to 121 Degree C. Tags: Lossy Foam Absorber, Die Cut. More details for AFR0000-01 can be seen below.