The size of the pencil, the hardness of the tip and whether it has an eraser are all properties of the pencil.
(it; has; an eraser) (The size of the pencil, the hardness of the tip and whether it has an eraser; are all; properties of the pencil)
it The size of the pencil, the hardness of the tip and whether it has an eraser
has are all
an eraser
properties of the pencil