this price is only for one mainspring
you need to choose to which you need height an mainspring
available are mainsprings to the following heights
1 - height 4.6 - 4.65 mm thickness 0.3 mm one piece (foto 2, 3)
2 - height 3.4 - 3.45 mm thickness 0.3 mm six pieces (foto 4, 5, 6)
3 - height 8.0 mm thickness 0.33 mm one piece (foto 7) - TIME SPRING
4 - height 4.0 mm thicknes 0.25-0.27 mm three pieces (foto 8) MAIN SPRING fits Travalarm and Leland
5 - height 3.35 - 3.4 mm thickness 0.23 mm two pieces (foto 9) CLOCK MAINSPRING
6 - height 5.6 mm thickness 0.18-0.20 mm one piece (foto 10) ALARM BARREL WITH SPRING fits Baby Ben
7 - height 13.0-13.3 mm thickness 0.38 mm one piece (foto 11) ALARM SPRING IN BARREL fits Big Ben Loud Alarm
8 - height 6.25 mm thickness 0.25 mm one piece (foto 12) ALARM SPRING fits Beliboy, Bingo, General, Raven, Shelby & Spar. (may be used)
9 - height 22.7 mm thickness 0.45 mm one piece (foto 1)
10 - height 17.0 mm thickness 0.35 mm one piece (foto 1)
11 - height 9.6 mm thickness 0.35 mm one piece (foto 1)
12 - height 8.0 mm thickness 0.35 mm one piece (foto 1)