PD-Refractories offers a broad variety of formats and grades of high quality expendables in different zircon mullite, aluminum oxide and fused silica types. Different shaping processes are used for the production of the expendables: hand ramming, slip casting, vibro casting and isostatic pressing. All grades fired with the correct temperature after shaping and drying. Thus, they are granting a long service life and in addition together with the choosing of high quality raw materials, a low glass defect potential. Inserts for orifice rings in aluminum oxide or isostatic pressed zircon mullite and chromium oxide and for the spouts extend the life time considerably. P-D Refractories is considering for the material selection all important parameters including the appropriate operating conditions, the type of glass, the operating temperature and the requirements on the format.