To allow a seller to surely and reasonably recover used balance weights by allowing a buyer to take out wheel balance weights from in a case body, packing the empty case with the used ones, affixing a returning slip previously enclosed to the outside thereof, and returning the case to the seller.

Wheel balance weights 1 are housed in a prescribed housing case 2, and a returning slip 6 in which the address of a responsible person for recovery of a manufacturer or a seller or the like, the address of where to return, the name of the article, and the like are entered is enclosed in the housing case 2, the lid is closed and delivered to the address for sales. After the buyer of the delivered goods takes out the returning slip 6 and the wheel balance weights 1 from in the housing case body 2, used wheel balance weights 7 are housed in the empty case and the lid is closed, and the returning slip 6 is stuck on the outside of the housing case 2, and the case is returned to a responsible person for recovery of a seller or the like to recover the used wheel balance weights. The responsible person for recovery of the seller or the like converts the wheel balance weights 7 made of lead into imitation gold ingots 13 to reuse them as weights for safes.