Preethi Mixer Grinder Motor Coupler. Compatible with Preethi Eco Plus, Preethi Chef Pro Plus, Preethi Eco Chef, Preethi Eco Twin, Preethi Blue Leaf, Preethi Steele,Preethi Nitro. Motor Coupler is the small circular part with teeth that sits on top of the Motor, the mixer Jar is placed on this Motor Coupler in such a way that the Jar coupler ...