Tender For supply of airbrakehosecoupling support for wagon to rdso drg. no. sk-73552 alt. 6, item no. 1 to 4. material and specification confirming for item 1 to 4 should be is 2062 : 2011 (re-affirmed - 2021), amendment no. 1 of nov. 2012, gr. e 250 a. [ warranty period: 30 months after the date of delivery ]