Vacuum door with bonded glass view port. Door was crafted with impressive workmanship. Knife edge is protected with copper gasket. If it doesn't seal, you may return it. The item "10 DN200CF CF Conflat Viewport UHV Vacuum Chamber Load Lock Access Door" is in sale since Wednesday, February 17, 2021.This item is in the category "Business & Industrial\Hydraulics, Pneumatics, Pumps & Plumbing\Pumps & Pump Accessories\Vacuum Pumps\Vacuum Chambers".surplus" and is located in Oakland, California. This item can be shipped worldwide.