what are the components of secondary cell wall

Dear student,

Secondary cell wall - The layer which is sandwiched between the plasma membrane and primary cell wall, consists of thick and inelastic cells is called secondary cell wall. The secondary cell wall is only present in mature and non-dividing cells.
Components of secondary cell wall - 
Cellulose
Lignin
Suberin
Cutin
Glycoproteins

​Regards.