Cover For Rear Steam Chest & Valve Spindle Guide, Drg No. Goc/X/Sk-11-09030. Note 1. For Equivalent Material Specification Refer Goc/X/Spec -X-032 2. `For Material Specification, The Firm Has To Submit Nabl Accredited Lab Test Certificate Along With The Material Supply [ Warranty Period: 30 Month S After The Date Of Delivery ] ]