As an independent manufacturer we belong to one of the leading supplier of precision O-rings and elastomer seals/gaskets. COG delivers from the Worlds largest O-ring stock (more than 45,000 items from stock) most various materials, including FFKM/FFPM. • Founded in 1867 in Pinneberg near Hamburg • Independent family company with more than 250 employees • Europe's largest O-ring stock (over 45,000 items in stock) • Tools for over 23,000 different O-ring sizes available • In-house mixing and mixture development • Close cooperation with leading raw materials makers • Releases and approvals granted for many materials and to hand • Own tool manufacture • Optimised delivery service from our new logistics centre opened in 2002 • Quality management per DIN EN ISO 9001:2008 • Environmental management per DIN EN ISO 14001:2009