S.I. Howard Glass Co., Inc. - Worcester, MA Distributor, Custom Manufacturer, Service Company
Distributor of borosilicate glass. Borosilicate glass is the flattest high heat glass available. Stock inventory available ranges from 0.7 mm thick to 15 mm thick with a standard sheet size of 33 1/2 in. x 45 1/4 in. allowing for flexibility in designs.