Logo of Schott Duran, a borosilicate 3.3 glass type.
DURAN Produktions GmbH &amp; Co. KG
2011-10-26
<a rel="nofollow" class="external free" href="http://www.duran-group.com/uploads/tx_fedownloads/Unternehmensbroschuere_03.pdf">http://www.duran-group.com/uploads/tx_fedownloads/Unternehmensbroschuere_03.pdf</a>