4" Tri Clamp Hemispherical Dome Lid
[Size]: 4"LID, 1/4" NPT female, 1/4" NPT male，2 x 1.5" sightglass
[Quality Materials]: The lid is made of high quality 304 stainless steel and the glass is made of high quality borosilicate which is durable, stable, rust and corrosive resistance and good for long time using.
[Precise Design]: it is designed to combine with a gasket and clamp to make a sanitary and easily cleanable connection.
[High Working Temp. & Wide Range of Applications]: The lid can be used to transmit medium between different systems and observe inside by sightglass It is suitable for different media including water, gas, and oil with working at -58°F~482°F
[Convenient organization and storage]: Packed in a small plastic bag with label.