The Chaco Refill Cartridge in yellow is an essential replacement for your Chaco chalk marker, keeping your fabric marking precise and consistent. This refill cartridge works with Chaco marking tools to deliver bright, removable chalk lines perfect for quilting, piecing, and embroidery projects. Simply insert the cartridge into your Chaco marker and continue marking with confidence on any fabric. Available at Glory Bee’s Sewing Center in Fallston, MD.