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