A biological graft transferring instrument for transferring a biological graft includes a main body, a displacement member capable of being displaced relative to the main body, and a belt-shaped member which is wound around the forward end and base end of the displacement member and is joined to the main body. The closure includes a reduced density core encapsulated by an agglomerated cork layer to which a cork veneer or printed paper or plastic layer is attached. Ziegler-Natta catalyst compositions containing the present procatalyst composition exhibit improved catalyst activity andor improved catalyst selectivity and produce propylene-based olefins with broad molecular weight distribution. The user interface is also configured to display the feed in association with an entity of the social network.