(2) 2.5 Lbs and (1) 5 Lb weight stack adapter plates. Will stay together during home gym exercise. Best design on the market. Patent pending. 3 year limited warranty for home use. Do not drop on hard floor. Shipping to Alaska, Hawaii, Puerto Rico, Guam, Virgin Islands, and APO/FPO addresses or PO Boxes It will work on most machines as long as the 2 guide rods are 5'' apart from center to center. Works with most of Marcy, Body Craft, Body Solid, Multi Sports, and Master Fitness weight stack system. Please check all dimensions prior to purchasing.