THe Velocifire Light wave (Candy Jade Green) Features a very long spring, and a custom stem with parts of it cut off for a more smooth experience. These also have a custom mold in order to fit the stem.
Photo attribution: KPrepublic
Photo attribution: Deskhero.ca
KK LIGHT WAVE SWITCH V2 - Velocifire
Aquaria With KK Light Wave Switches Typing Sounds - Helpingly
Banging Good Switch Series - KK Light Wave V2 - Poes Keyboards
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