本公司的鐵線圈，採用進口包膠鋼線製成，外層尼龍色澤亮麗，極薄而勻稱；中心鋼材堅硬，曆久不變形，無論外觀及耐用性，均遠勝一般包膠鐵線。
Our metal spirals are made of imported nylon coated wire. The surface of the nylon coating is smooth and lustrous and the core wire rigid, offering far better durability and appearance than other types of nylon coated wire.
規格表Specifications:
|
線圈內直徑
Coil Diameter
|
建議最大裝訂厚度 Recommended Maximum Book Thickness (mm)
|
齒距
Pitch
|
|
英寸 毫米
inch mm
|
毫米
mm
|
毫米
mm
|
|
1/4 6.4
|
3.4
|
6
|
|
5/16 7.9
|
4.9
|
6
|
|
3/8 9.5
|
6.5
|
6
|
|
7/16 11.1
|
8.1
|
6
|
|
1/2 12.7
|
9.7
|
6
|
|
9/16 14.3
|
11.3
|
6
|
|
5/8 15.9
|
12.9
|
6
|
|
3/4 19.1
|
15.1
|
6
|
|
7/8 22.2
|
18.2
|
6
|
|
1 25.4
|
20.4
|
6 or/或8
|
|
1-1/8 28.6
|
23.6
|
6 or/或8
|
|
1-1/4 31.8
|
25.8
|
6 or/或8
|
|
1-1/2 38.1
|
32.1
|
6 or/或8
|
|
1-5/8 41.2
|
35.2
|
6 or/或8
|
|
2 50.8
|
42.8
|
6 or/或8
|
