Specification Type Solvent Based Ink Printing Type Digital printing Model Number Eco Solvent Ink Product Name Eco-solvent Ink For Roland Suitable Printer For Roland RF 640 Volume 100ml, 500ml, 1L, 5L , 20L and so on Color K C M Y - 4 Colors Quality 100% Testing Before Send Out Certificate Yes Feature Vivid Color Warranty 1:1 Replace Any Defective Eco solvent Ink Packing Customized Packaging Package Standard Package Product Description Noted: When purchasing ink, please tell us your model and printhead model, so that we can confirm whether your machine can use our ink.