Slider Core-MechanicalSlider Core Mechanical 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. TIP: All Slider Cores need to be matched with the Slider Shell before they can be assembled and played normally. Slider