Spiral Rings: 1. Plastic material 2. Coil diameter: from 1/4" to 2" 3. Pre-cutting length: A4, Letter, Legal Plastic Spiral Rings:Coil diameter: from 1/4" to 2";Pitch available: 4:1 & 5:1;Pre-cutting length: A4, Letter, Legal;Color available: black, white, transparent, red, yellow, blue & green (other colors available on request);... more details available on request.