C10200 Cu-OF is a high purity, non phosphorus-deoxidized copper that does not contain in vacuum evaporating elements. Cu-OF copper alloy is oxygen-free up to 99.95%.This grade of copper boasts exceptional purity. C10200 is produced by directly converting selected refined cathodes and castings under carefully controlled conditions to prevent pollution of pure oxygen free metals during processing. The production method of OFHC copper ensures the ultra-high grade metal with copper content of 99.99%. The content of foreign elements is so low that the inherent characteristics of copper have been highly developed.

Aluminum Rectangle Tube, is an extruded aluminum tube that is widely used for all types of fabrication projects where lightweight and corrosion resistance is a primary concern - frame work, support columns, gates, fencing, handrails, etc. Rectangle Aluminum Tube has square corners inside and outside, with no weld seam. Available in both 6061-T6 and 6063-T52, with the 6063 square tube being more formable than the stronger grade 6061 square tube.   

4J50 alloy，iron and nickel constant expansion alloy is a series of constant expansion alloys which can be matched with soft glass and ceramics with different expansion coefficients in a given temperature range by adjusting nickel content.

The 4J6 has an expansion coefficient similar to the soft glass in the temperature range of 20 to 400℃. For matching and sealing with the corresponding soft glass. This kind of alloy contains chromium. After oxidation treatment, the alloy surface produces a very dense oxide film, which is strongly bound with the matrix, and has a good infiltration with soft glass. Therefore, a high-strength sealing surface can be obtained. It is an important sealing structure material in the electric vacuum industry.