( I ) GLASS FOR COMPARTMENT DOOR 8X420X900MM Drg. no. CC56408, Alt- ' f ', ITEM NO. 2, as per IS: 2553 ( PART- I )- 1990, TYPE- C, QLTY- AA ( II ) COMPARTMENT MIRROR FOR LSCN ( BUS TYPE WINDOW ) COACHES. Drawing No. LSCN/ BW- 6- 4- 001, ALT- a, COL- I.