1,long life 2,low noise 3,High precision 4,worke in high speed 5,ISO9001-2008, QS9000 railway parts--shell coverSpecifications1,ISO9001-2008, QS90002,long life3,low noise4,High precision, 5,worke in high speed6,manufacture upon requestPayment Term:one month after receiving your L/C or T/T in advancePackaging Detail: plastic film, carton railway shell cover