RUBI mixing paddle for mixing cementitious mortars. The mixing blades on the head of this paddle are flat. This increases the capacity of the head and therefore allows the user to increase the mixing capacity of the paddle. The mixer paddles for cementitious mortars have a head designed to perform a movement from the bottom up. For use with Rubimix 9 and any mixer with M14 thread. Mixes between 25-40kg depednding on mixer and material.