[ Ready go to ... https://amzn.to/44ikF8d [ Amazon.com : Rayson MTSRM3116 Metal Coil Spiral for Binding, 3:1 Pitch, 36-Loops, 5/8" Spiral Binding Coil Metal, Multicolor & Pack of 100 : Office Products] ]
Amazon.com : Rayson MTSRM3116 Metal Coil Spiral for Binding, 3:1 Pitch, 36-Loops, 5/8" Spiral Binding Coil Metal, Multicolor & Pack of 100 : Office Products