TTC Bluish White switches feature a number of unique features such as a “double coiled spring”, dust proof stem, and “muted bottom”. The goal of this is a more linear weight curve, and a quieter and deeper bottom out sound. The double-coiled spring results in an extremely satisfying press and return combined with the light spring weight (42g actuation), the top-out being described as “punchy”. Convex lens in top housing to help diffuse backlights. There’s also a small silicone plug at the bottom of the center tube of the bottom housing which allows for the bottom-out to be muted as the stem pole makes impact, but the top-out is louder by comparison as a result.