plastic spiral 1.environmental wire 2.various colors 3.reasonable price 4.good plastic spiral, ... .top plastic filaments,smooth and lustrous surface,strong adhesiveness,endure abrasion and humidity,be able to bear rusting ,eroding,and aging.3. Innocuous material ... /4"(6.4mm)-----2"(50.8mm)5. Notebook,album,calendar and so on.