Double sprial( double loop wire) Material: Nylon Coatd wire or mental steel wire Size: 1/4inch 5/16inch 3/8inch 7/16inch 1/2inch 9/16inch 5/8inch 3/4inch 7/8inch 1inch 1-1/2inch 1-1/4inch Pitch: 3: 1 and 2: 1 Colour: White black and colourful Double loop wire were used for binding the papers of the books, we can offer the wire in spool and also cut in piece, any colour and size can be made by custmer requirement. Add to Basket