A = [
    [
      {Lens Cap(Front)},
      1.0
    ],
    [
      {UV Filter},
      1.0
    ],
    [
      {Lens Cap(Rear)},
      1.0
    ],
    [
      {Lens Hood},
      1.0
    ],
    [
      {Lens Bag},
      1.0
    ],
    [
      {Gear Ring},
      1.0
    ]