A removal unit includes a latch and a tab separably connectable to the latch. The latch includes latch arms each including a connection hole and an opening extending from the connection hole and being smaller than the connection hole. The tab includes a body, tab arms extending from the body, and protrusions provided on the tab arms to protrude toward each other. The protrusions each include a connecting part and an engaging part extending from the connecting part and being larger than the connection hole. The connecting part is provided on the tab arm, and configured to be placed into the connection hole. The connecting part has a width in a first direction smaller than the width of the opening and a length in a second direction perpendicular to the first direction smaller than the diameter of the connection hole and greater than the width of the opening.