UV Grade Sapphire Viewport, Over-Pressure, 0.75" View Dia, 2.75" Conflat Flange
UV Grade Sapphire Viewport, Over-Pressure, 1.50" View Dia, 4.50" Conflat Flange
UV Grade Sapphire Viewport, Over-Pressure, 2.00" View Dia, 6.00" Conflat Flange