Ikhebula le-MGXTYSWV eliphakathi nendawo yekhebula lezimayini, imicu, ama-200μm noma ama-250μm, abekwe kushubhu elivulekile elenziwe ngeplastiki ephezulu. Amashubhu agcwele amanzi - ukumelana nokugcwaliswa kokugcwalisa. I-tube isongwe ngesendlalelo se-PSP okude. Phakathi kwe-PSP ne-tube yamanzi e-tube evulekile - Kusetshenziswa izinto ezivimbayo ukugcina ikhebula lihlangene futhi lingena emanzini. Kubekwa izintambo ezimbili zensimbi efanayo ezinhlangothini ezimbili zetheyipu lensimbi, ngaphezulu kwe-sheath ye-PE emncane, ikhebula liqedwa nge-polyethylene (pe) sheath yangaphandle.