Features: Precise fit, exceptionally compatibility: Engineered specifically for X5Pro pen tip, perfectly matching the pen barrels structure. Smooth Writing, Enhanced Experience: Features a high-precise tip for smooth writing with crisped, fluid strokes. Durability Quality, Extended Life: the refill boasts exceptionally long use. A single refill delivers significantly greater writing mileage than comparable products, substantially reducing replacement frequency. Portable Design, Effortless Carry: Compact and lightweight refill dimensions, paired with a convenient storage case, slip easily into pockets or pencil cases. Effortless Replacement: Tool less refill replacement enables quick and convenient changes. Specifications: Component: Plastic Size: 17.8x1.7mm/0.7x0.07in Package Type: 5pcs/10pcs/20pcs/30pcs refills optional + 1 clip Applicable model:for X5Pro Refills Use scenario: Suitable for daily office, study notes, creative painting and other occasions Package Includes: 5pcs/10pcs/20pcs/30pcs refills optional + 1 clip note: Due to problem of light effects,there might be tolerances in product, please understand. Please allow 0-1cm error due to the measurements