The big 3 offers the largest selection, best warranty and biggest chamber sizes. Tuttnauer has one area of expertise; autoclaves. It invests its full energies and resources to sterilization and infection control. Tuttnauer offers a wide range of sterilizers to choose from. Tuttnauer offers a two-year parts and labor warranty and 10-year chamber warranty on all of its fully automatic machines. When it comes to chamber sizes, Tuttnauer EZPlus autoclaves have a 19.8-inch depth making them the deepest table top chamber size in the industry.