Ena ke khetla e sirelelitsoeng e thata e etselitsoeng ho nka lisebelisoa tsa tlhahlobo, lik'hamera, lisebelisoa le lisebelisoa tse ling ho latela tlhoko ea hau ea polokelo.
Re feme e nang le boiphihlelo ba lilemo tse 15, e ikhethang ka tlhahiso ea lihlahisoa tse ikhethileng joalo ka mekotla ea litlolo, linyeoe tsa litlolo, linyeoe tsa aluminium, linyeoe tsa sefofane, joalo-joalo.