Preethi Steele Mixer Grinder with Turbo Vent and Improved Couplers Stainless Steel Body & Jar TurboVent allows cool & silent operation; Enhanced performance Strong Newly Designed Couplers Unique Jar-Machine locking system for extra security Jar Configuration: 1.5 Liter Jar, 1.0 Liter Jar, 0.5L Chutney Jar Note:The locking mechanism is set to prevent jars from popping out. The machine will not turn on unless the jars are properly placed in the machine (refer image).