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Kailh Box keyboards

Kailh Box switches arrived in 2017 from the Chinese maker Kaihua. The contacts sit inside a box around the stem to keep dust out, and Kaihua rates them IP56. They come in linear, tactile and clicky versions. The clicky ones use a click bar, which gives a sharper click than Cherry's Blue. Early Box stems ran slightly thick and could crack keycaps, until Kaihua narrowed them in 2018. On a used board, check keycaps for cracked stems and listen for tactile switches that have started to click.