I-stopcock enengcindezi ephezulu yezindlela ezintathu yenziwe ngomzimba we-stopcock (eyenziwe yi-PC), i-valve eyinhloko (eyenziwe yi-PE), i-Rotator (eyenziwe yi-PE), ikepisi yokuvikela (esenze yi-ABS), i-Screw cap (isenze nge-PE), isixhumi sendlela eyodwa (esakhiwe yi-PC+ABS).