C-ALL Observation Ports permit the operator to observe the interior of kilns, ovens, furnaces or boilers under operating conditions. The inside shutter closes automatically when the counterweighted handle is released.

Low Temperature Peep Sights are of one-piece construction and incorporate thick glass windows. Recommended for use in temperature ranges not exceeding 400 oF. Low temperature peep sights are available in sizes from 3/8” to 1-1/2” pipe.