1-sheet of Arc Technologies PN: DD-10466, RF/Microwave Broadband Magnetic Silicone Absorber, 95 mil thick, adhesive backed.
PN: DD-10466Sheet Size: 6.00 in x 6.00 in x 0.095 in
Datasheet: http://arc-tech.com/pdf/DD-10466%20Rev%20B.pdf