Ader 2.5 lb add on weight plate for home gym with weight stack machine system. As long as 2 guide rods are 5" apart from center to center Works with Marcy, Body Craft, Body Solid, Multi Sports, Master fitness ETC 90% of home gym with weight stack system. Ships to all 50 States, APO, FPO, and P.O. Box Ader durable 2.5lb add on adapter weights can be stacked 2-3 high in 2.5, 5, 7.5lb increment would not shake off during exercises