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3M Membrane Switch Spacer 7953MP is a 1.5 mil 200MP high-performance acrylic adhesive double coated on each side of 0.5 mil polyester film carrier with double liner of 4.2 mil 58 lb moisture resistant lay-flat polycoated kraft paper. Primary liner is printed. 3.5 mil Double Linered Membrane Switch Spacer with 200MP adhesive. 58 lb lay-flat polycoated kraft paper liners on each side. Primary liner is printed. Ideal for circuit separation in switches until actuation. Easy to die-cut and process. Use for steel rule die-cutting. Used for graphic attachment.