With the stop cord, the cords on the jackets, pants or gym bags can be fixed directly at the opening of the tunnel and adjusted in length. Thus, they serve as a reliable closure, prevent the cords from sliding. They are washable up to 40 degrees. For 5 mm maximum cord diameter.Matière: plastic and metal spring. TAILLE: 20 mm x 20 mm. Equally called stop cord, cord block, cord block.