Two 2.5 lbs. adapter plates for the home gym with a weight stack machine As long as 2 guide rods are 5" apart from center to center and all other dimensions are okay to fit properly (see picture) Works with most Marcy, Body Craft, Body Solid, Multi Sports, and Master Fitness home gyms with a weight stack system Shipping to Alaska, Hawaii, Puerto Rico, Guam, Virgin Islands, and APO/FPO addresses or PO Boxes Ader durable special design 2.5lb rubber weight stack adapter plates can be stacked up 2-3 high and provides stability while exercises