Slider Core-Mechanical-POMSlider Core Mechanical POM Slider Core Mechanical has a paragraph version and a dense version. The paragraph version pushes crisply and the dense version pushes smoothly and densely. You can choose freely according to your preference. You can freely split and combine the Shells and Cores of ZERO ONE Slider to experience the joy of DIY. Compared to the metal Slider Core, Slider Core Mechanical POM is lighter, more nimble, and comes in brighter colors,