The same commitment to quality the L.J. Star name is known for is now available to you for all your replacement gauge glass and accessories! L.J. Star replacement borosilicate gauge glass is manufactured exclusively to MIL G 16356-D standards. Gauge glass sizes 1 through 9 are stocked and available for immediate delivery with other sizes available upon request. The Ilmadur patented I-420 gauge glass provides better visual clarity, greater chemical and thermal shock resistance, higher pressure safety factorsand is the only gauge glass specifically manufactured to Mil Spec. Gaskets and shields are also in stock and available.