1 set includes 4 pieces (shell, collet, magnet, mylar). If you use additional replacement pieces (eg need an additional piece of mylar), please pay for another set to cover costs. Thanks.Material Location: The StoreUnit Cost: $0.35Unit: 1 set Supplier Source Information These are the suppliers that MakeHaven purchases these items from. Material Source: Amazon OLDThe Button Guy NOT WORKINGMaybe TryMaybe Try