ʻO ka pepa kila kila ke ʻano o ka lahilahi, a ʻo nā huahana lahilahi i kapa ʻia he mau pepa kila. ʻO ka pepa kila kila ka mea kaulana loa ma ka mākeke ʻoi aku ka mānoanoa ma mua o 0.15 mm. ʻO ka ʻōwili kāʻei pālahalaha ke ʻano hana hana i hoʻohana nui ʻia o ka pepa kila kila, nona ka huahana kiʻekiʻe, ka nui o ka unahi a me ka nui o ka hana.

E like me ka inoa e hōʻike nei, ʻo ke kini kila kila ke ʻano o ka kini kila kila. ʻO ka ʻoiaʻiʻo, ʻaʻole maopopo ka wehewehe ʻana o ka huaʻōlelo "foil", a ʻo ka hapa nui o nā kila i kapa ʻia he mau kini ma lalo o 150um. No ka mea, ʻaʻohe kūlana no ka kini kila kila, hana ʻia ka kini kila kila me ka pepa kila kila. Hoʻohana ʻia ka kini kila kila e hana i nā mea hoʻokaʻawale ma nā ʻāpana kaomi kiʻekiʻe i nā mea hana kikoʻī, nā mea kūkulu nui a me nā mea hoʻololi wela i nā mīkini turbine mahu, a pēlā aku.