3M™ EMI Absorbers are flexible composite materials incorporating specialized magnetic particles and a non-conductive PSA to absorb EMI. These absorbers help protect nearby electronics from EMI by absorbing EMI at multiple frequencies.

They are used in a wide range of applications to help reduce EMI/RFI noise and improve signal integrity that could interfere with a system’s operations.

The brands listed above are trademarks of 3M.

https://www.3m.com/3M/en_US/p/c/electronics-components/absorbers/