Metal Shielding Metal mesh and EMF protection Get it here Copper, bronze, brass, and stainless steel gives you a strong and effective EMF protectioz You can use your metal mesh on the wall, inside of the wall, as a fence, or you can build a Faraday cage out of it. Copper Mesh Copper mesh:40 mesh protects 50 dB at 1 GHz.100 mesh protects 55 dB at 1 GHz.200 mesh protects 63 dB at 1 GHz Get it here 40 meshThe holes in a 40 mesh are bigger and the metal is thicker and stronger. 200 meshThe 200 mesh holes are tiny tiny.This is why it provides a better shielding. The metal is thinner but the protection is still more effective because of the tiny tiny hole size. Bronze Mesh Bronze mesh:40 mesh protects 49 dB at 1GHz against microwaves.100 mesh protects 54 dB at 1 GHz against microwaves.200 mesh protects 61 dB at 1 GHz Get it here Brass Mesh Brass mesh:40 mesh protects 48 dB at 1 GHz.100 mesh protects 53 dB at 1 GHz.200 mesh protects 59 dB at 1 GHz. Get it here Srainless Steel Mesh Stainless steel mesh:40 mesh protects 47 dB at 1 GHz.100 mesh protects 51 dB at 1 GHz.200 mesh protects 59 dB at 1 GHz. Get it here Metal shielding effectiveness PDF Test File Download PDF Mesh count They metal mesh comes with different hole sizes and mesh count. The hole sizes are square.The best possible protection is with 200 mesh count.The higher number the more holes per inch meaning that the holes are smaller the higher mesh count. 40 mesh:There´s 40 cells per inch.100 mesh:There´s 100 cells per inch.200 mesh:There´s 200 cells per inch. 1 inch is 25,4 mm “ Strong EMF protection Ehsshield