Adjustable speed range from 50 to 1200 rpm. Exceptional magnetic coupling ensures stir bar remains locked with drive magnet, even in viscous solutions. Unique StirTrac technology offers improved slow speed stirring, consistent speed control and stronger magnetic coupling. The StirTrac braking feature brings the stir bar to an immediate stop. Cimarec’s seamless reflective white ceramic top enhances sample visibility and provides an easy-to-clean and alkali/acid resistance surface. Integral ring-stand holder with set screw accommodates 1/2" (1.3 cm) diameter support rod (Not provided, see 88090 series). Rugged low-profile cast aluminum body provides stability and durability. All models supplied with detachable cord and 2" x 3/8" Dia. TFE-coated stir bar, (4" x 4" units include 1" stir bar). 110V