STIRRER only no hot plate optionBenchmark hotplates stirrers and hotplate-stirrers feature an exceptionally durable chemical resistant white ceramic work surface. Their space-efficient design (8 X 9 in. footprint) makes them ideal for use on crowded benchtops and inside of bio-hoods.Advanced microprocessor controls with convenient turn knobs allow quick precise adjustment and maintenance of speed and temperature. Safety indicator LEDs on the front panel indicate when the heating and/or stirring functions have been activated. With a square 7.1 in work surface all three models are compatible with a wide variety of popular sizes of borosilicate glass beakers flasks bottles and other vessels. The hotplate/magnetic stirrer model (H4000-HS) comes complete with a support rod for mounting thermometers and temperature probes.Ceramic work surface 7.1 x 7.1 in.Stir speed from 60 to 1500 rpmTemperature control up to 380CThree models heat-stir heat only or stir only