Staedtler Mars Micro mechanical pencil lead refills are designed for precision, durability, and ease of use. Available in 0.5mm and 0.7mm sizes, these high-quality graphite leads are ideal for writing, drawing, and technical work. Each pack includes a tube of 12 leads, with Staedtler’s “12-a-go” system allowing for quick, clean, and convenient refilling directly into compatible pencils like the Mars Micro 775. The leads are break-resistant, smooth to write with, and easily erasable, making them suitable for students, professionals, and artists.