Çolakoğlu started its iron and steel business in 1945 with the steel business of our founder Mehmet Rüştü Çolakoğlu in Karaköy. Çolakoğlu commissioned its first rolling mill in 1960 in Sütlüce, again in Istanbul. The first meltshop started production in Dilovası in 1969 to meet the billet requirement in the country.

Established in Istanbul in 1957, Silvan Sanayi A.Ş is one of the well-established and experienced steel casting factories of Turkey. Our foundry has a production capacity of 10.000 tons per year on a total area of ??22.500 m2 including 9.000 m2 closed and 13.500 m2 open.

- We are a company established in 1990 that provides aluminum profile-based products to many sectors, mainly automotive. -Altaş Aluminum exports its' production to European countries, USA and Canada. In the domestic market, we supply products to the most important export companies of our country such as Ford Otosan.

Sarkuysan, multi-partner with more than 5000 people all over the country in the field of electrolytic copper industry since 1972 cable, wire, flat wire, lama and pipe products It serves.

The aim of the establishment is to become an international force in the personal care and cosmetics industry, develops products in line with quality, innovative and consumer's needs. Lider Cosmetics, which aims to become a leading company that is beneficial to the society, economy and the environment, continues to work towards this goal.

MEHMET ÇETİN who was the founder of the Bosphorus Pişmanian started regrettment in 1957. After a very short time, Mehmet Çetin, the best master of Izmit, first opened his own production in Istanbul Harem Bus Terminal in 1974.

VANASAN Valve Fittings and Tattoo Industry and Trade Inc. has been manufacturing and trading valves and fittings since 1979. Our company has become one of the leading industrial valve manufacturer with over 1200 different types of production in Turkey, our brand is well-known in Europe and the Middle East.

BİMSER SOLUTION has been offering its customers a wide range of products that can be integrated with each other and with other products, ranging from software packages for companies of different sizes and sectors to a complete solution development platform where various business applications can be designed.

Our company manufactures macrame and tulle laces and embroidered curtains.

YMS Yildiz provides services in the sector with pipe fitting products that it has produced with more than 20 years of experience in the field of installation materials.

ENPAY, a respected and leading company in the international area, produces - Transformer Components - Magnetic Nuveler - Screen packages - Wave wall boilers - High Voltage Isolation Components - Transformer Windings.

Ak Piliç, located in Bolu province, is the production center of the poultry industry and has been serving for broiler production for 20 years. Ak Chick has invested in today's modern technology and computer systems by constantly renewing production conditions and machine park in Feed Factory, Slaughterhouse and Production Farms since its establishment.

Başatlı Boru Profil San. Which is one of the few producers and industrial establishments of Turkey. And Tic. The existence of AS in the sector dates back to 1953. Başatlı started his career in 1953 and has played a role in establishing the Başatlı Pipe Profile Factory in 1993 with his extensive experience and knowledge in the sector of commercial life.

In 1996, Sarcam started its activity with the purpose of producing double glazing with nine staff in 450 sqm indoor area. Our firm, which continues its quality and service based production, got the authorized manufacturer license of Isıcam in 2006.

More than 100 people working in the production of steel mill equipment using 8000 m2 closed area by using the facilities of modern technology.

Treatment Bee is one of the leading manufacturers in Turkey in water and wastewater treatment technologies. Our company, which uses state-of-the-art manufacturing and design tools, has made it a principle to develop engineering experiences in an innovative structure.

Turkey's leading producer of coated cardboard fourth largest in Europe Kartonsan entrepreneurs conducted by the state at a time when the production of paper and with a bold move Turkey's "first" as a special coated cardboard manufacturer was founded in 1967. Kartonsan started production in 1970, it is Turkey's leading manufacturer of coated cardboard in Europe and the fourth largest in terms

ARROW Metals, in 1975, Turkey's largest LPG cylinder LPG Cylinder Protector Manufacturer and was established as a public Dip Rings producer. As Metal Process Company, OKLU Metal designs and manufactures more than 500 different types of LPG Cylinder related parts, especially LPG Tubular Housing Rings and Dip Rings.

Ekbar Polyester Industry Limited Company started its business life in 2000 with its special polyester production and has attracted attention with its high isolated baskets, boat production and various special designs in the market.

ROK Teknik was established in 2011 as a technology provider for the LPG Tube Industry and a manufacturer of all the machines involved in the production. ROK Teknik is a sister company of OKLU Metal Company which has 40 years experience in LPG Tube Production sector.