supply of a set consist of following items : (a) emergency openable window arrangement with sealed window unit for 1220 x 560 window for ac coaches as per drg. no. icf/sk-5-4-275, alt. , a set consist of following items : (a) emergency openable window arrangement with sealed window unit for 1220 x 560 window for ac coaches as per drg. no. icf/sk-5-4-275, alt. f col. i , item no. 1 to 19. (b) holding frame arrangement for emergency window as per drg. no. icf/sk-5-4-277 alt. a col. i. (c) frp housing arrangement for emergency window as per drg. no. icf/sk-5-4-249 alt. a, item no. 1 to 11. (01 set = item no. a + item no. b + item no. c). [ warranty period: 30 months after the date of delivery ] ]