Ulusi, 250μm, amayikidwa mu chubu lotayirira lopangidwa ndi pulasitiki yapamwamba ya modulus. Machubu amadzazidwa ndi pawiri kudzaza madzi. Waya wachitsulo, womwe nthawi zina umakutidwa ndi PE wa chingwe chokhala ndi ulusi wambiri, umakhala pakatikati pakatikati ngati membala wachitsulo. Machubu (ndi zodzaza) amazunguliridwa mozungulira membala wamphamvuyo kukhala pachimake chachingwe komanso chozungulira. PSP imayikidwa nthawi yayitali pamwamba pa chingwe, chomwe chimadzazidwa ndi chigawo chodzaza kuti chitetezedwe ku madzi. Chingwecho chimatsirizidwa ndi sheath-retardant sheath.
