Yenday ali ndi zinthu zingapo, kuphatikizapo zida ndi zolimbitsa thupi, zopangidwa zambiri zoyera, zolimbitsa thupi, zopanga zigawenga, zigawo zisanachitike.
Phiri la Stallok Zosefera Phunziro la Phiri F1, F2, F3. Kupanikizika kwa ntchito ndi kuchokera ku 3,000sig (206 bar) mpaka 6,000bar (413bar).
