supply of procurement of primary vertical d er for train-18 etc. , primary vertical damper for train-18, emu us & memu us coaches to drawing no. train18/mc/ac-0-1-009, item no.1, alt.-b, and in compliance to rdso specification rdso /cg-1800 5 or en-13802 (latest revision). 1. firm has to submit oem drawings with detailed dimensions & characteristics. 2. type test shall be conforming to rdso/cg-18005 (latest revision) or en- 13802. 3. service trials shall be as per rdso cg-18005 (latest revision). special condition: 1. p roto type sample (including type test) to be got approved from icf before manufacturing fo r bulk supply. 2. the firms who have already supplied the same item need not get fresh prot otype approval. [ warranty period: 30 months after the date of delivery ] ]