This is a IC for 3.5mm thick noise / resonance damper pads similar to the ones GON sales. (
see here)
example Image:
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I'm located in the EU and will ship those worldwide, although shipping to the US in a package with tracking is ~16€ and in a envelope (size 45x35cm) is ~7€.
If there is enough interest i will run this as a GB soonish, with prices around or below the GON price.
Most likely in 3 sizes (60%, TKL, Fullsize).