... body +96% alumina We are professional produce 25MM, 35MM, 40MM, 45MM ceramic cartrdige, platic cartrdige, cermaic valve core, ... .[ Quality ]: Approved ISO9001:2000, CE, RoHS standards[ Size]: 40MM[ Specification ]: TemperatureTurnPressureAir TestTimesCeramicComponentPlaneGranulation90°C90°C1.2MPa0.8Mpa700000AL2O395%0.3um0.2um100 ... .251718.520.2521.7523.2524.525.7527 40mm diameter Ceramic Valve-Core