What shapes of stirrers are available for Reactor-Ready and other reactors? What are the stirrers made from? There are three types of rotor shapes available as standard for our jacketed lab reactors: Anchor Turbine Retreat curve. For Reactor-Ready and Lara, standard vessel kits include anchor stirrers and process vessel kits include turbine stirrers. Reactor-Ready Pilot vessel kits include turbine stirrers. The rotors are PTFE, with the shafts comprising a stainless steel core encapsulated in a PTFE coating.