двойной провод о

double wire o,double wire,wire o 1)our twin wire ringis made of high quality carbon steel. 2)our twin wire ring is easy to press into the shape of round. 3)twin wire ringis very convenient to bind. 4)twin wire ringis used in printing finished products such as book binding, table calendar, loose-leaf notebook, map, diary, catalogue, and recipe. Advantages: 1) Free precut service 2) Good quality 3) Full range of specifications-size from 1/4'' to 2'' 4) Wide choices of colors.