The Tajima Replacement Cotton BOM & GUN 6m is a Japanese replacement cotton designed for Tajima's BOM and GUN series chalk lines. Made of cellulose, it ensures excellent absorption and even diffusion of sumi ink for crisp, consistent lines.

This replacement part extends the performance of your Sumitsubo while maintaining good quality marking. Ideal for maintaining compact models used on construction sites, in carpentry, or timber framing.