These variable-speed stirrers are electronically controlled and built to handle viscosities ranging from watery solution to high viscosity fluid, depending on the model. All stirrers have totally enclosed, non-ventilated motors to keep corrosive fumes and dust out for a long and trouble-free service life. Permanent magnet D.C. motor provides maximum constant torque through entire speed range. An On/Off switch allows for quick stopping, if necessary. Heavy cast aluminum control box and integrated motor keeps work area uncluttered. A manually resettable circuit breaker protects against overload. All models include an aluminum support rod (10"L x 9/16"dia), a 303 stainless steel shaft (12"L x 3/8"dia), a 2.5" dia 303 SS propeller and 6' three-wire cord with grounded plug. Specifications:(Drive Type: Direct),(Gear Ratio: None),(Motor Dim:4w x 7.5H x 4.5D inches),(Shipping weight:8lbs)