Features
1. Stable performance, high efficiency.
2. Easy installation, simple operation.
3. Adjustable for various bobbin sizes.
4. Pre-set output quality and the meter length.
5. Nice bobbin thread forming and no damage on the  bobbin.
Application
| Bobbin Specifications | Bobbin Diameter 
 | Bobbin Height 
 | Inner Hole Diameter 
 | 
| 1.0 time 
 | 20-21 mm 
 | 9-9.2 mm 
 | 6 mm | 
| 1.6 times 
 | 23 mm 
 | 9-10.5 mm 
 | 6 mm | 
| 2.0 times 
 | 25 mm 
 | 10.5 mm 
 | 6 mm |