This flexible filament can be used with general 3D printers.  It's a very flexible filament produced by our compound technology.  It has the core and is rigid when it's the filament form, and does not extend in the vertical direction during modeling.  Thereby, flexible and high precise 3D models can be produced stably by general FDM(Fused Deposition Modeling) mechanism 3D printers in the market.  Stabler modeling is possible by using our Sube-up Tube for 3D printer Filament-supply.  It can be colored.