Metallic foil or plaited braid to shield equipment wires. Coaxial cable has this EMC shield built into the wire construction, underneath an outer insulation layer. Other wire bundles can be wrapped in foil, or ready-made cable braid applied over the whole construction. The connectors on the ends of the wire would also require metal covers, and the braiding or foil needs to be attached to the metal to give total coverage.
For shielding on PCBs (known as Board Level Shielding or BLS), shielding typically consists of a PCB with a ground plane built into it, and a metal box (known as a shield can) placed over the sensitive or transmitting elements. The components are then completely surrounded by a Faraday cage arrangement.
In devices such as audio speakers, an inner metallic casing would be used to successfully block EMI produced by nearby transmitting devices (such as microwaves and TVs).

Product description
Name	copper foil
Material	99.8% copper
Width	standard 1350mm
Thickness	standard 0.105mm(3oz),0.14mm(4oz)
Feature	EMI shielding
Application	faraday cage,MRI room

Product description:

1. The product structure is based on copper foil as the substrate, conductive acrylic adhesive as the adhesive, plus release paper.

2. Three-tier architecture is very suitable for cutter mold or the metal mold die-cutting, Can be flat cutter or round cutter to die-cutting.

3. The width of the product available from 3mm ~ 380mm. Standard length is 50m., also do 100m, 150m or longer, save customers the trouble of frequently reloading.

Part Number	Backing Material	Thickness of Backing (mm)	Total Thickness (mm)	Holding Power Min/inch	Adhesion Strength kg/25mm	Adhesive Component	Shield Efficacy 10MHz~ 1GHz (dB)	Conductivity z-ohms	Integrated thermal conductivity (W/mK)
XPH0M123	Copper Foil	0.012	0.030±0.01	≥1440	>0.8	Acrylic	≥60	<0.03	60
XPH0M183	Copper Foil	0.018	0.050±0.005	≥1440	>1.0	Acrylic	≥60	<0.03	60
XPH0M253	Copper Foil	0.025	0.06±0.005	≥1440	>1.0	Acrylic	≥60	<0.03	80
XPH0M353	Copper Foil	0.035	0.070±0.005	≥1440	>1.0	Acrylic	≥60	<0.03	90
XPH0M503	Copper Foil	0.050	0.085±0.005	≥1440	>1.0	Acrylic	≥60	<0.03	110
XPH0M753	Copper Foil	0.075	0.11±0.01	≥1440	>1.0	Acrylic	≥60	<0.03	130
XPH0MA03	Copper Foil	0.100	0.135±0.01	≥1440	>1.0	Acrylic	≥60	<0.03	160
XPH0MA23	Copper Foil	0.125	0.15±0.015	≥1440	>1.0	Acrylic	≥60	<0.03	170
XPH0MA53	Copper Foil	0.150	0.20±0.02	≥1440	>1.0	Acrylic	≥60	<0.03	190