Hikelok o loʻo i ai le tele o ituaiga o oloa, e aofia ai valve meafaigaluega ma mea faʻapipiʻi, oloa maualuga maualuga, oloa mama maualuga, vaʻavaʻa faʻagasologa, masini masini, faiga faʻataʻitaʻiga, faiga faʻapipiʻi muamua, masini faʻapipiʻi ma mea faigaluega meafaigaluega.
Hikelok meafaifa'ailiga la'ititi fa'apipi'i fa'apipi'i fa'asologa e ufiufi MRWU, MWE, MWEL, MRWE, MWV, MWTB, MWT, MWBT, MWRT, MRWT, MWC. Ole lapopoa ole metric e mai le 6 i le 12mm ma le lapo'ai vaega e mai le 1/8 i le 1/2 inisi.
