Thermocollant elbows: Sempically fixes with an iron. Sachet of 2 elbows. Tail of each elbow: 9.5 x 7 cm. Couleur, shape and unalterable elasticity with washing. Must be strongly requested, we advise you in addition to heat -selling the elbows of sewing them as well. These elbows are pre -fired to facilitate sewing.