Quickly store a single line on the most compact spool. Great when you need to bounce between spots. Or you can use to quickly access a premade line with a fly. Ultra portable, no fuss magnetic nano spool. Comes with an adapter to suit different width rods. There are a "birch in amber" or "bamboo" options available.
ID 25mm or 15mm with adapter. OD is 55mm, width is 10mm. Weight: 8g.