These glass sight gauges are encased in a chrome plated protective guard. There are 2 sizes, 12" and 16" lengths

Please not the 16" gauge is out of stock until late August.

Installation: Screws directly into a through wall stainless steel Sight gauge adapter.

We frequently get asked if these sight gauges have graduations already marked on them.....no they don't because  it depends on the dimensions of the boiler or container as to where the liquid volume measurements would come on the sight gauge.  Once installed you can make your own volume graduations if you require them.