Coloplast Self-Cath® Coude Olive Intermittent Catheter with Guide Strip 16Fr, 16" L Latex-free The Self-Cath® closed system is a Latex-free unisex system that provides a method for safe, simple catheterization designed to reduce the risk of urinary tract infections. It includes a 100% latex-free Coloplast Self-Cath® catheter.