; A. J. Oster Company is a family of metal service plants that maintain an extensive inventory of copper. Brass. Phosphor. Bronze. Nickel silver. Beryllium copper and aluminum for many END uses. Each center is equipped with a range of production capabilities that include precision slitting. Sheeting. Traverse winding and HOT AIR leveled tinning. From heavy strip to foils. Oster has a variety of...