These industrial lab ovens are constructed with welded steel and quality components throughout. 51-1000 Laboratory Ovens are available as Class “B” only, in 208 or 230-1-60 voltage. Like all Precision Quincy ovens, the 51 series laboratory ovens come with a limited warranty and are factory wired and tested prior to shipping. These laboratory ovens meet or exceed NFPA-86, NFPA-70, OSHA & UL requirements and can be ordered in seven standard sizes at varying maximum temperatures.