1. raw material: nylon coated metal wire 2. calendar, document, book binding 3. Package: 58000 per spool

Double wire o  binding is widely used in book, calender binding.

Data of Double Loop wire o : 

Pitch	Size	SPOOL A (loops/spool)	SPOOL B (loops/spool)	Wire Diameter	Recommednded Max.Binding Thickness
P3:1	3/16" (4.8mm)	118,000	135,000	0.65mm	3.0mm
	1/4" (6.4mm)	80000	95000	0.70mm	4.0mm
	5/16" (7.9mm)	58000	66000	0.80mm	5.6mm
	3/8" (9.5mm)	42000	48000	0.80mm	7.0mm
	7/16" (11.1mm)	28000	37000	0.90mm	9.5mm
	1/2" (12.7mm)	24000	27000	0.90mm	11.0mm
	9/16" (14.3mm)	18000	23000	1.00mm	12.7mm
	5/8" (15.9mm)	15000	16500	1.05mm	13.2mm
P2:1	1/4" (6.4mm)	53000	63000	0.70mm	4.0mm
	5/16" (7.9mm)	40000	44000	0.80mm	5.6mm
	3/8" (9.5mm)	28000	32000	0.80mm	7.0mm
	7/16" (11.1mm)	19000	24000	0.90mm	9.5mm
	1/2" (12.7mm)	16000	18000	0.90mm	11.0mm
	9/16" (14.3mm)	12000	15000	1.00mm	12.7mm
	5/8" (15.9mm)	10000	11000	1.10mm	13.2mm
	3/4" (19.0mm)	7000	8600	1.15mm	15.0mm
	7/8" (22.2mm)	4500	6700	1.20mm	19.0mm
	1" (25.4mm)	3600	4700	1.25mm	21.0mm

5/16" 7.9mm 3:1 pitch nylon coated metal wire o binding for calendar binding