Imported nylon yarn thickness:4mil width:4mm 6mm 6.35mm 7mm 8mm 10mm 11mm 12.7mm 25.4mm length:460+/-50m 920+/-50m advice:we also have uninked ribbon rolls4040 HD 4.5mil:fit for Normal dot matrix printer and English typewriter(24PIN)4040 ND 4 mil:fit for nine line dot matrix printer and English typewriter(9PIN)4070 ND 5 mil:fit for high speed dot matrix printer1.white/inked printer ribbon2.High ...