Ho tloha ha maemo a lipeipi a amohela tsamaiso ea Borithane kapa Amerika, mofuta o tloaelehileng oa khoele lebaleng la nozzle ke khoele ea phala ea Borithane (BSPT) kapa khoele ea phala ea Amerika (NPT).

Ho hlakile hore o ka hlakisa khoele ea nozzle, joalo ka khoele ea metric. Nakong ea ts’ebetso ea lihlahisoa tsa rona, tlhahlobo ea likhoele e thata haholo. Litlhaloso tsohle tsa likhoele li na le litekanyo tse tloaelehileng tsa khoele, kahoo haeba u netefatsa likhoele tse tloaelehileng tsa likhokahano tsa hau tsa phaephe, likhoele tseo re li etsang li ka fihlela litlhoko tsa hau.