Borosilicate glass, thermally prestressed, optically tested, properties as laid down in DIN and OeNORM. Diamaters range 31,75mm - 200 mm.

Optimum solution for up to 35 bar saturated steam. Can be used with all media except steam at service conditions up to 400 bar or temperatures up to 400 °C.

For steam above 35 bar and with high pH media must be protected by a mica shield. All media except steam up to 340 bar or up to 400.°C.