4" Weld on Sight Glass with Threaded Ferrule

This 4" weld on sight glass is perfect if you would like a visual of your
product during a run. The interior depth on this sight glass is 11/16" from
end to glass, and the exterior length is 2" from end to end.

The sight glasses come fitted with a threaded ferrule, are manufactured from
food grade 304 stainless steel, and meet all of today's requirements for
sanitary fittings.

These sight glasses are rated for a maximum pressure rating of 90 PSI at 75?
F.