Isongo Lensimbi Engagqwali
Yekuchumana: Mama-easures ama-33.2 mm ubude, ama-26.3 mm endaweni ebanzi kakhulu, no-2 mm ubukhulu. Ibheyili ilinganiselwa ku-6 mm ubukhulu. Isongo sesitayela se-flex insimbi engagqwali nezilinganiso eziyi-1.5 mm ububanzi futhi iyanweba isuka ku-2 3/8 "iye ku-3".