The original “Mayer” rod. Popularized by Charles Mayer in the 1920's and still the most popular. Available in sizes #3 to #75 including many half sizes. The size refers to the wire diameter in mils (.001 inch). Wire wound rods can be stripped and rewound to save cost and reduce waste. There are no minimums and no setup charges for wire wound rods.
 
Prices vary by wire size.