Characteristics:

2nd Class bricks are used in internal walls, partition walls, and other non2nd Class bricks are used in internal walls, partition walls, and other non2nd Class bricks are used in internal walls, partition walls, and other non2nd Class bricks are used in internal walls, partition walls, and other non2nd Class bricks are used in internal walls, partition walls, and other non 2nd Class bricks are used in internal walls, partition walls, and other non2nd Class bricks are used in internal walls, partition walls, and other non2nd Class bricks are used in internal walls, partition walls, and other non