The latest Ai AccuTemp 0.9 cubic foot vacuum ovens come standard with our industrial first 5 sided pad heating technology that covers left, right, top, bottom and back of the chamber and heats 25% faster. Together with aluminum shelves, they provide you great temperature uniformity inside the oven chamber. Also come standard is the adjustable gas back fill capability with needle valve and vent port, while the low proportional gain temperature controller keeps your oven temperature within +/- 1°F accuracy. Every one of our vacuum ovens goes through a 24-hour vacuum leak test before leaving our factory. Comes standard with four aluminum shelves. Features * New 5 sided pad heating technology and aluminum shelves provide excellent temperature uniformity and faster heating rates (25% faster in our lab test). * Adjustable gas back fill capability with needle valve and vent port. * 3rd gen low temp controller with new LCD display. * Dual layer observation window with 1/2″ tempered safety glass. * Easy-to-clean 304 stainless steel interior for exceptional durability and ease of maintenance. * An Ai 110V Easy Vac 9 cfm dual-stage vacuum pump with exhaust filter and KF25 vacuum fittings included for immediate use. * Easy-swap vacuum pump exhaust filter prevents oil mist from polluting your work environment, it also returns trapped pump oil back to the pump and makes the pump much quieter to run. * Attention: Before initial use, run oven at 400°F without vacuum for 15 minutes to burn off any residue that may have been introduced during the manufacturing process.