TANK® MX Weight Horn/Stacking KitDesigned for the Standard TANK MX, this kit provides a weight horn to add weight plates and an attaching device so TANK sled units can be stacked for storage and portability. The weight horn is also required to attach the Group Anchor Station (XGAS) to the MX Features: Kit contains 2 weight horns and 2 stacking receivers Solid steel weight horns are nylon covered and 8. 1 in. (200 mm) tall The stacking receiver mounts on the bottom of the TANK MX and