Cremallera
https://www.amazon.es/WKXFJJWZC-Aberturas-Cremallera-Bricolaje-Manualidades/dp/B07W6LC2Q4/ref=sr_1_10?__mk_es_ES=%C3%85M%C3%85%C5%BD%C3%95%C3%91&crid=RVXDM1AWM46R&dchild=1&keywords=cremalleras+50+cm+colores&qid=1616173481&sprefix=cremalleras+50+cm+colores%2Caps%2C189&sr=8-10