PACK CONTENTS: Set of 20 roller pens including 10 blue and 10 black pens with 0.5mm tip size for precise writing experience SMOOTH WRITING: Features a pipe tip design that ensures consistent ink flow and effortless writing on various paper surfaces INK CAPACITY: Large capacity ink reservoir ensures long-lasting performance and reduces the frequency of replacements DESIGN FEATURES: Multilayer fin structure provides better grip control and enhanced writing comfort during extended use VERSATILE USE: Ideal for everyday writing needs including note-taking, journaling, office work, and academic purposes