Nor-Cal manufactures a complete line of ISO vacuum fittings. The tube portions are fabricated from 304 stainless steel. For increased resistance to corrosion in downstream semiconductor processes, Nor-Cal now stocks some ISO flanges and fittings in 316L material. Nor-Cal makes its own elbows, and all tees and crosses are made with the pulled-port technique. This allows smooth, crevice-free butt welds to provide the maximum in cleanliness for UHV applications. Bakeout range is up to 204°C.