The invention relates to a catalyst system for polymerization of propylene, the catalyst system comprising a Ziegler Natta procatalyst, an organoaluminium cocatalyst, a monoester of an aromatic carboxylic acid as the internal donor and ethyl-4-isopropoxy benzoate as the selectivity control agent. The inner walls are configured to frictionally engage and hold the base plate against inadvertent slipping out so that the base plate may be placed in the opening and supported in a predetermined position by the base plate mounting tool while fasteners are engaged to mount the base on a receiving wall of a cabinet. A top plate is used to close a top end of the canister. The controller then reports these estimated temperature characteristics via a user interface.