supply of set of secondary vertical d er , (1) set of secondary vertical damper bracket assembly ( air susp.) consisting of 02 nos. - (a) secondary vertical damper bracket assembly lh (air susp.) to rcf drg. no. lw03339, alt. a qty/set= 01 n o. (b) secondary vertical damper bracket assembly rh (air susp.) to rcf drg. no. lw03344, alt. a qty/set = 01 no. (2) set of items for secondary vertical damper bracket assembly ( for lhb coaches with helical suspension) consisting of 02 nos. - (a) secondary vertical damper bracket assembly lh ( helical susp.) c onforming to rcf drawing no. lw03346, alt. a, qty/set-01 no. (b) secondary vertical damper bracket asse mbly rh ( helical susp.) conforming to rcf drawing no. lw03347, alt. a, qty/set-01 no [ warranty period: 30 months after the date of delivery ] ]