Birta labajibbaaran waa nooc ka mid ah walxo leh qaabab kala duwan, cabbirro iyo siyaalo kala duwan oo laga sameeyay ingot, billet ama bir cadaadis cadaadis ah.Waxa loo qaybin karaa rogaal-celin kulul iyo qabow;Dhererka dhinaca birta labajibbaaran ee duuban ee kulul waa 5-250mm, kan birta labajibbaaran ee qabowna waa 3-100mm.