Manufactured from heat resistant, durable borosilicate glass according to ISO 6556 standard. Featured with GL 14 screw thread polypropylene side arms fitting 6-10 mm bore size tubings. Side arms can be easily connected or disconnected to the main body preventing accidental breakage. Thick wall, heavy base and reinforced rim prevent breakage during washing and transportation. Volume graduations and inscriptions are printed with white enamel.