Get the best spines for your next bookbinding project. These white metal spiral coil binding spines are made of nylon coated steel and are stronger and have a better weight compared to plastic coils. As a base color that practically goes with everything, these particular coils are in white, but it is also available in 3 different colors. However, with special orders in minimum weights and lead-time, more color choices can be selected. As for the size, it is available in sizes up to 2” in diameter. These spines are compatible for spiral coil binding machines. Get 100pk on each order. Never go wrong with a classic, get this time tested White Metal Spiral Coil Binding Spines.