The MF22-0002-00 from MAST Technologies is a Microwave Absorber with Insertion Loss -21.5 dB, Thickness 0.25 Inch/6.4 mm, Thickness 0.25 Inch, Thickness (mm) 6.4 mm, Operating Temperature -60 Degrees F to 250 Degrees F. Tags: Lossy Foam Absorber. More details for MF22-0002-00 can be seen below.