supply of valve spindle guide for x class locomotives , supply of two items for cylinder assembly of x-class locomotives as given below. item no(1) - valve spindle guide (rear steam chest cover) for rack cylinder assembly of x- class locomotive as per drawing no. goc/x/sk -11-09520 qty - 2nos/set item no (2) - valve spindle guide (rear steam chest co ver) for adhesion cylinder assembly of x-class locomotive as per drawing no goc/x/sk-11-09510 qty - 2nos/set note: 1. item no (1) & (2) consists of one set. 2. for equivalent material specifications refer goc/x/specx-032 3. for material specification, the firm has to submit nabl accredited lab test certificate along with the material supply [ warranty period: 30 months after the date of delivery ] ]