Mainsprings

7 x 11 x 12.5 1.60 x 0.10 x 320 GR4487 Bestfit MS-711M

7 x 12 x 10.5 1.60 x 0.09 x 260 GR4463 Bestfit MS-712H

7 x 13 x 9.5 1.60 x 0.08 x 240 GR4445 Bestfit MS-713E

7 x 15 x 9.5 1.60 x .06 x 240 GR4413 Bestfit MS-715E

7 x 8.5 x 16.75 1.60 x .135 x 420 GR4580 Bestfit MS-785V

8 x 12 x 10.5 1.70 x .09 x 260 GR4852 Bestfit MS-812H

8 x 12 x 11.5 1.70 x .09 x 300 GR4854 Bestfit MS-812K

9 x 10 x 13.75 1.80 x .11 x 360 GR5278 Bestfit MS-910N

9 x 11 x 12.5 1.80 x .10 x 320 GR5254 Bestfit MS-911M

8 x 10 x 13 1.70 x .11 x 320 GR4907 Bestfit MS-810N