The 40-0064-0254 from Nolato is a EMI Shielding Wire Mesh with Attenuation 45 to 125 dB (MONEL), 40 to 125 dB (ALUMINIUM), 60 to 125 dB (TCS), 40 to 125 dB (Stainless Steel), E Field Attenuation 1 MHz to 100 MHz: 100 to 125 dB(Monel) 100 to 125 dB(Aluminium) 108 to 125 dB(TCS) 100 to 125 dB(Stainless Steel), H Field Attenuation 10 KHz to 1 MHz, 45 to 60 dB (Monel), 40 to 60 dB(Aluminium), 60 to 85 dB (TCS), 40 to 58 dB(Stainless Steel), Plane Wave Attenuation 400 MHz to 10 GHz, 80 to 98 dB(Monel), 65 to 95 dB(Aluminium), 62 to 99 dB(TCS), 60 to 94 dB(Stainless Steel), Wire Diameter 0.11 mm (Monel), 0.13 mm (Aluminium), 0.11 mm (TCS), 0.11 mm (Stainless Steel). More details for 40-0064-0254 can be seen below.