Seibi (Huzhou) Communications Technology Co. Ltd is one of the best professional company to develop and manufacture zirconia ceramic products. Our main product is zirconia ceramic sleeve. The standard kind can be used for optical fiber connector, adapter, and the nonstandard one can be for tosa/rosa receptacles (transceiver parts). Our products are of high precision(1µm). In addition, we have developed and are currently manufacturing zirconia ceramic pin gauge/plug gauge which can be controlled at 1 µm ,and it has many advantages over the metal gauge. For more information,please contact us.