Color:

Four layers [with wheels, can hold books, test papers, A4 documents, stationery, sundries, etc.]]

Five layers [with wheels, can hold books, test papers, A4 documents, stationery, sundries, etc.]]

Six layers [with wheels, can hold books, test papers, A4 documents, stationery, sundries, etc.]]

Eight layers [with wheels, books, test papers, A4 documents, stationery, sundries, etc.]]