... Environmental Single Loop Binding Wire. 2.High adhesion, nice look ,anti-stretch/elongate . 3.Strong tension. Spiral inner diameterSuggested binding thickness Model ... -3/444.5036.00300250.842.00325 Environmental Single Loop Binding Wire we use imported high quality carbon steel ,and select ... 1/4 to 2, Our single coil can be binding quite simple, Widely used inloose-leaf notebook, calendar, catalogue ...