Zen Tenkara Rod Cap Holders are custom made to fit all of Zen’s tenkara rods. Never lose or misplace your rod cap again. These state-of-the-art, flexible cap holders are made for us in the USA. Nearly indestructible, they are durable and eco-friendly made from TPU (Thermoplastic Polyurethane) plastic that completely decomposes within 3 to 5 years. The Nickle plated spring steel ring prevents corrosion from outdoor elements and makes attaching the cap holder to your lanyard, pack or fishing gear, quick and easy. Available in 3 sizes: Small, Medium and Large. Also fits other tenkara manufacturers rods.