A set of Proline Nelson Springs, new in the package. This set includes four main springs (2 inches long) and 4 valve springs (1 inch long). This set is new and was distributed by National Paintball Supply. Colors indicate tension and are labeled as Yellow=Light, Green=Medium Light, Blue=Medium and Red=Heavy.
The main springs might work on autocockers with screw ivgs but I can't remember if the valve springs will.
