The following are all sterile, medical swab sticks with rayon tips and polypropylene test tubes. All of these devices measure 12x150 mm. in diameter and come in an amies transport medium. They differ in what materials are used. Model 26068 contains a stick made of plastic while model 26078 has a stick made of aluminum. The stick on model 26088 is made of twisted, flexible aluminum. Model 26071's stick is comprised of plastic and it also contains charcoal.