This is a strap for organizing nylon float stoppers. You can choose from nylon No. 2.5 black, which is easy to tie, or No. 2 pink or lemon, which are supple and less noticeable. Please feel free to ask, and we will make the change. When you run out, you can of course use spare parts from that brand, but we also offer them here for ¥100, so please let us know. We would appreciate it if you could also take a look at our other listings.