supply of 1.ball valve 20 mm for sanitary facility (length 80 mm &nom. dia 20 mm), to rcf drg. no. lw63106, alt a item no 4. 2. ball valve 15 mm for sanitary facilities for lhb coaches to rcf drg no-lw63106 alt a, specn: as per drawing.1.ball valve 20 mm for sanitary facility (length 80 mm &nom. dia 20 mm), to rcf drg. no. lw63106, alt a item no 4. 2. ball valve 15 mm for sanitary facilities for lhb coaches to rcf drg no-lw63106 alt a, specn: as per drawing.,ball valve 20 mm for sanitary facility (length 80 mm &nom. dia 20 mm), to rcf drg. no. lw63106, al t a item no 4. [ warranty period: 30 months after the date of delivery ] ] , ball valve 15 mm for sanitary facilities for lhb coaches to rcf drg no-lw63106 alt a, specn: as per drawing [ warranty period: 30 months after the date of delivery ] ]