Corrugated cardboard sheet purchasing Türkiye

Our company was established in 1992 and since then initiates, promotes and implements hightech projects along the process of Russian electronics,
instrument-making and other technological industries enterprises development and re-equipment.
Our company opening production line in Turkey and we looking for local suppliers. Production will be located in Istanbul.
We interesting in cardboard sheets, boxes and Z-cardboard. Please inform about your standard sizes, MOQ, prices based on EXW Turkey.
Also please send me technical specifications on this items.