Those are aftermarket spares, they will work but do not expect the same quality level you find on original parts. Keyboard will work, but will likely require a somewhat stronger and more precise pressure whereas original parts are more forgiving. If you are a professional writer you might dislike or even hate a replacement KB, most users would hardly notice, it really depends on your style and expectations. Topcase is quite certainly original, but it might be refurbished with aftermarket parts, you will have to ask the seller for confirmation and details. If I have the chance, I prefer using for my repairs 2nd hand original spares rather than new aftermarket.
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