This is a great value-for-money analogue magnetic stirrer from Medline which offers a large area of 180 x 180mm and simple to use controls. Constructed from chemically resistant ceramic coated steel, it delivers excellent reliability with reproducible results at a sensible price. A screwed 12.5mm screwed thread is included for the addition of a retort rod (not included). Key Features: -. Case Construction: Ceramic Coated Steel (chemical resistant). Stage Area (mm): 180 x180. Speed Range (rpm): 100 to 1500. Retort Rod (12.5mm ø): 400mm/760mm (optional). Dimensions (w x d x h): 410 x 210 x 150mm. Weight (kg): 4.