The USA Lab 1L digital mantle is the most reliable digital magnetic heating mantle on the market. These mantles allows users to have repeatable, consistent results with ease. Please review photos to see minor scratches on the unit. It has been tested and works great. Voltage 110V 60Hz Single phase 450 watts Temperature range RT ~ 850℉ （450℃） Maximum rotation speed 1400 rpm Stir bar 1pc 1 x 0.3" Unit size Φ13.0 × 9.0’’ For Technical Support, Questions, or Other Issues Please Email or Call Us!