O-rings for Mechanical Keyboard

MiDNiGhT2903

Honorable
May 29, 2013
195
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10,710
Been wanting to buy some o-rings for my keyboard because I keep bottoming out.
I looked up at WASD keyboards and found that there's two kinds of travel reduction, 0.2mm and 0.4mm. I'm using a Ducky 9087 Shine 2 with Cherry MX Red. Does anyone know which should I get?