100pcs x Disposable Pastry Bag Icing Piping Cake Pastry Cupcake Decorating Bags Simply twist into cupcake to create a hole perfect for filling with ganache, caramel, frosting or other hidden treats. Help to get rid of the center of the cake you make as a corer. Material:Plastic.Height:Approx.6cm,Hole diameter:2.3cm.