Preethi Jar Coupler for Eco Twin, Eco Plus and Blue Leaf Mixers Compatible with Preethi Eco Plus, Preethi Chef Pro Plus, Preethi Eco Chef, Preethi Eco Twin, Preethi Blue Leaf Jars Easy to Replace Original Preethi Product Fits well on to Jars of Preethi Eco Twin, Eco Plus, Chef Pro Jar Coupler is the small circular part with teeth that sits under the Jar