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The rhombic dodecahedron earrings come as a set of 3 pieces. They are very delicate by using the thinnest possible dimensions. Being printed in nylon they are not very fragile, but in case something happens there's always an extra one. Unfortunately shapeways won't let me bundle earring hooks. You can get them cheap at any jeweler. Or you can write me an email to email@example.com with your address and I'll send a pair of hooks.