The MF22-0001-00 from MAST Technologies is a Microwave Absorber with Insertion Loss -8 dB, Thickness 0.125 Inch/3.2 mm, Thickness 0.125 Inch, Thickness (mm) 3.2 mm, Operating Temperature -60 Degrees F to 250 Degrees F. Tags: Lossy Foam Absorber. More details for MF22-0001-00 can be seen below.