Head: GlassShaft: Stainless SteelCase: PolystyreneCap: Cork Thickness Length (mm) & Quantity: 0.50 x 35.0 / 20pcs in each packet 6 packets per box These pretty glass-head pins are great for tacking standard fabric such as cotton hemp and wool. Manufactured by Tulip Company Limited. Warning: This product should be used for sewing purposes only. Please keep out of reach of small children.