Feature: 1. File security for file turn smoothly and will not scratch files, without opening match hook mouth 2. Elegant appearance, structural stability, not easy to scratching or denting 3. Only increase the intensity of the whole folder, not easily deformed Ring binder Material: strip steel 1. Surface treatment: nickel electroplating, nickel free (through the 10 mental detection and can provide the SGS reports) 2. Base width available: 15mm, 17mm,20mm, 26mm, 36mm, 45mm 3. Overall length available: 89mm, 123mm, 133mm, 152mm, 158mm, 171mm, 195mm, 210mm, 241, 264mm, 280mm, 285mm, 292mm, 384mm 4. Inside diameter: 15mm, 16mm, 20mm, 25mm, 30mm, 35mm, 40mm, 45mm, 50mm, 65mm,78mm 5. Shape of ring: Q, R, D 6. Type available: patent products and common products 7. OEM service provided.
