Conformity Certificate No. RU.MCC.305.1020.4.ПР.22548 dd. April 19^th, 2011, issued by certification body «Mosekspertstroysertifikatsiya» for rolled product manufacturing, thermomechanically treated profile of A500C class for concrete structures reinforcement production (light section of diam. 8 mm-25 mm) of Ст4пс, Ст4сп steel grades (serial production) in conformity with STO ASChM 7-93 requirements.