Hole End mainspring for clock

Loop end mainspring for clock

Shuangyuan produce various sizes of hole end mainspring and loop end mainspring for nearly 20 years.

Common size as below:

14mm x .30 x 30mm (1250mm)

15mm x .30 x 30mm (1250mm)

17mm x .35 x 35mm (1300mm)

17mm x .40 x 40mm (1550mm)

17mm x .45 x 45mm (1700mm)

18mm x .25 x 30mm (1470mm)

18mm x .30 x 30mm (1470mm)

18mm x .40 x 40mm (1550mm)

18mm x .40 x 45mm (2030mm)

18mm x .45 x 45mm (1700mm)

18mm x .50 x 45mm (1625mm)

19mm x 0.3 x 30mm(1250mm)

19mm x 0.45 x 45mm(1700mm)

20mm x 0.25 x 30mm(1400mm)

20mm x 0.30 x 30mm(1250mm)

20mm x 0.45 x 45mm(1700mm)

21mm x 0.30 x 30mm(1250mm)

22mm x 0.30 x 30mm(1250mm)

24mm x 0.40 x 40mm(1500mm)

24mm x 0.50 x 50mm(2000mm)

and more.