ʻO "3k" ka helu o nā filament a i ʻole ka nui o ka pūʻolo.ʻO ke ʻano o kēlā me kēia "puʻupuʻu" o nā fila kalapona i ulana ʻia i loko o ka lole he 3,000 mau filament kalapona pākahi.ʻOi aku ka nui (6k, 12k, etc.) ʻoi aku ka mānoanoa o ka carbon-fiber "puʻupuʻu" a no laila nā lole mānoanoa.