One of the largest containerboard manufacturers in the US, Packaging Corporation of America (PCA) produces about 3.7 million tons of containerboard a year, most of which is converted into corrugated boxes, and ships about 48.9 billion square feet of corrugated products. PCA's mills also churn out about 1.1 million tons of kraft linerboard and about a million tons of semi-chemical corrugating medium. The company sells to a diverse group of industries. Its corrugated packaging includes shipping containers for manufactured goods, retail boxes and displays, and wax-coated boxes and meat boxes for agricultural use.