Reusable Clay Mold Making Oyumaru. Only Use Hot Water. Perfect for Short Clay Project (Multi Color) - 1pkg (7 pcs) Make your own clay molds, using only hot water. This will be one of your best purchases ever. Great clay molding material which is re-usable, so you can keep using it for different mold shapes. Perfect if you need to make lots of clay molds but only need to use each to create few copies. Picks up detail surprisingly well. 1 box 7 pcs multi color (5/8 x 1/4 x 2 1/4 inches per piece) Imported from Japan. Ships from USA the next day you place your order