1.Ladies bra extension material: the fabric part is made of elastic cotton and the metal hook part is made of stainless steel, the cotton fabric is soft and comfortable to wear. 2.Multiple adaptation: this brassiere extenders have black colors, can match with your different colors bras, also you can choose the color according to your interests. 3.Extra room for you: the extended bra strap can create some extra room for you, thus to make it comfortable and easy when wearing your bras. 4.Extend bra lifetime: this brassiere back extension helps to adjust your new bra and old bra size in case of weight gaining, pregnancy and bra's shrinkage. 5.Main Material: Polyester Main Color: Black Item Size: 2.2"x 2.0"(L * W) Metal Hook Link Spacing: 0.75" Weight: 37.5g / 1.32oz Package Include: 3 x Hook Bra Extender.