Iqhele ukusetyenziswa ekubumbeni inaliti okanye ukubumba i-extrusion, isetyenziswa ikakhulu kwimveliso yeUmbhobho wamandla we-MPP, umbhobho ongengoxinzelelo, ukuvuthela iimveliso zokubumba, isiseko somthwalo, iinxalenye zebhayisekile,icala lebhetri, iindawo zokutshiza, izilungisi zeemoto njalo njalo.