Cross Pen Refill Collection Single Blue Selectip Gel Rollerball Pen Refill. This refill is compatible with the following collections: Classic Century, Century II, Townsend, ATX, Peerless 125, Botanica, Cross X, Bailey, Edge, Calais & Beverly. Visit our 'Cross Pen' Collection and find the perfect pen to carry with you to all those important meetings, exams and more. You will also find these pens make a lovely and unique gift for someone special to cherish always.