This is a bevel gear with diameter at 4m. and we also have many other dimension for option.We are specialized in kinds of casting and forging parts, such as spur gear,helical gear,herringbone gear,straight bevel gear,spiral bevel gear,inside gear,worm gear,rack gear, segment gear,segment end cover,etc., especially focus on kinds of girth gear with maximum diameter at 16meters ,gear precision at class 10,and the matched gear shaft maximum diameter 2.5meters,gear precision at class 5.we are well prepared to cooperate with you, please contact with us for any request.OEM factory,CITIC IC industries.