Ibanez model numbers are used to identify a guitar model. Most Ibanez model numbers have three sections: * A series code, * the specific model number, * one or two suffixes. A model number could look like this: RG3520Z where RG is the code for RG series, the specific model number is 3520 and the suffix is Z. Sometimes, for instance in catalogs, the abbreviation defining the model finish is included to the model number, so you would get RG3520Z HBK or even RG3520ZHBK (without the space).