Benchmark Scientific, B1001-XL, BactiZapper Tilt MicroSterilizer with Adjustable Tilt Angle Features: Adjustable tilt angle, for more ergonomic inoculation (reduces hand fatigue) Same convenient operation as popular "Classic" model XL with wide chamber for sterilizing large vessels (tubes, flask mouths, etc.) The BactiZapper TILT Series utilizes the same well-proven technology of original Bacti-Zapper Classic, but with a unique, adjustable head angle that allows for more convenient sterilization. When loosened, the adjustment knob can be shifted upward or downward, resulting in a tilt angle range of 55 Degree C. The XL model offers an increased chamber diameter of 35mm, making this product more suitable for the sterilization of larger objects, such as tube mouths or flask necks. Model features a lower temperature "standby" setting to extend the usable life of the heating element.