Hoʻokumu ʻia ka maikaʻi o ka filament brush pp i kēia mau pae hoʻohālike:

1. E ana inā like ke anawaena filament

2. nānā inā he nui ka lauoho

3, me ka mīkini hoʻāʻo tensile e ana i ke ʻano o ka uea palaki, e ʻike inā he maʻalahi ke wāwahi i ka uea.

4, ho'āʻo wai paila, inā he maʻalahi ka deformation

5, e kūʻē i ke kāleka kala, inā ʻo ka pololei o ke kala o 98% a i ʻole