supply of air brake hose coupling , air brake hose coupling support to rdsos drg.no. sk-73552, alt.no.-6, item no.-1 to 4, materialshould be to is: 2062-2011, amend.1 of nov.2012 gr.e 250 a [ warranty period: 30 months after the date of delivery ] ] , apd for angle cock to rdsos drg no.wd -86045-s/5, item no.-4, alt. no. -nil or latest.dimension of x will be 85 mm and y will be 115mm. [ warranty period: 30 months after the date of delivery ] ] , locking bracket for bp & fp. drawing no. : rdsos drg. no. wd-10004-s-04 alt-00 , item nos. 4 & 3. material and specification: as per drawing [ warranty period: 30 months after the date o f delivery ] ]