Nke 20mm caps na propA ka emere maka akara ngosi na nyocha nke ihe nlele nke isi na ntọala ụlọ nyocha. Igwe ndị a nwere dayameta 20mm, na-enyere aka siri ike ma nwee ntụkwasị obi dabara adaba na Critamp Isi okwu. Nke ahụ bụ ihe dị elu, na-enye ezigbo ihe nlereanya site na igbochi mmetọ na evaporation n'oge nchekwa.