Across International AT09.220 Ai AccuTemp 5 Sided Heating Vacuum Oven with Back-Fill Capability, Limited Time Special, 220V, 0.9 cu. ft. 5 sided heating system and aluminum shelves provide excellent temperature uniformity 3RD gen low Temp Controller with new LCD display adjustable gas back fill capability with needle Valve and vent port best choice for the curing and converting of oil extracts dual layer observation window with 1/2 inch