Documents Gallery Articles Certificates Certificates The quality of crushed stone of all fractions is confirmed by certificates of conformity, declarations of conformity of the customs union and sanitary and epidemiological conclusions. In terms of the content of natural radionuclides, porphyrites belong to the 1st class of building materials, which means that its use is unlimited in all types of construction. Certificate of Conformity No. ROSS RU.AB28.H18699 Certificate of Conformity No. ROSS RU.AB28.H19243 Declaration of Conformity GOST 8267-93, TR CU 014 2011, 31424-2010, TR CU 014 2011 Front side back side Certificate of Conformity No. POCC RU.CM25.H00733, POCC RU.CM25.H00733 Front side back side Products comply with GOST standards About us Crushed stone production Catalog Request Contacts © 2014 - "Spetstekhproekt" About us Crushed stone production Catalog Request Contacts Site development: Internet Agency Dextra Email: tdus2008@gmail.com