These are Durock's POM linear switches, these full POM housings, linear stem (proprietary P3 material) and 63g gold-plated spring. The all POM housing provides a deeper sound for the switch compared to PC...

These are the legendary H1 linear switches designed by HHHH (Quad H), these come with a 78g gold plated spring. They are manufactured by JWK, with a special material added in...

These are JWK's Jwick black linear switches, which is one of their newer budget switch options. These switches have a full nylon housing*, POM linear stem and 58.5g stainless steel...