Protective Caps for 3ml Tubular Glass Vials

Keep compatible 3ml pen cartridges organized with these reusable protective cartridge caps. Designed for long, cartridge-style vials measuring approximately 12mm × 64mm, the flexible covers fit over compatible cartridge ends and help reduce exposure to everyday dust, dirt and handling contact during storage. seven assorted colors make visual identification simple, allowing cartridges to be grouped by contents, project, date or category. The caps are lightweight, reusable and easy to maintain. Product Features: Designed for compatible 3ml pen cartridges Fits cartridge-style vials approximately 12mm × 64mm Nine assorted colors for visual organization Flexible and reusable construction Easy to install, remove and clean Suitable for storage and organization Package Includes: Protective cartridge caps in nine assorted colors Important: Measure the cartridge before ordering. Capacity alone does not guarantee compatibility. These caps do not fit standard round 3ml glass vials and are not a replacement for the cartridge’s original stopper or sealing system. Cartridges and other accessories are not included.

• DESIGNED FOR 3ML PEN CARTRIDGES: Made for compatible 3ml cartridge-style vials measuring approximately 12mm wide and 64mm long. These caps are not designed for standard round 3ml glass vials.
• 7 COLORS FOR EASY SORTING: Seven assorted colors provide a simple way to organize and distinguish cartridges by project, contents, date or personal preference.
• PROTECTIVE CARTRIDGE COVERS: The flexible caps fit over compatible cartridge ends, helping protect exposed areas from everyday dust, dirt and contact during storage and handling.
• REUSABLE FLEXIBLE DESIGN: Easy to install and remove without additional tools. Rinse with water after use and allow the caps to air-dry completely before reuse.
• CAPS ONLY: Suitable for organizing compatible 3ml pen cartridges at home, in workshops, studios or storage cases. Cartridges, pens, holders and other accessories are not included.