These rails were a huge help for playing with double tracks! The connecting parts have a unique round shape. Are you looking for these? My child wanted them, so I bought them, but they barely used them and got bored of Plarail. These are items used by a child and stored at home, so please understand. Thank you for looking. *I am also selling other Plarail items. Please take a look if you'd like. (*´∀｀*) Plarail Double Track Curved Rails