Three 2.5lb durable adapter plates for home gym with weight stack machines Fit most fitness equipment as long as 2 guide rods are 5" apart from center to center, 3 guide barrell has 1" space in between on top plate Works with Marcy, Body Craft, Body Solid, Multi Sports, Master fitness and other brands fitness equipment Ships to all 50 States, APO/FPO addresses and P.O. Box Ader weight stack add on weights 2.5lb can be stacked up with best interlocking design to prevent shaking during exercises.