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

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