Add to Cart Mainspring, 1.40 x 0.110 x 340 x 10.00, Manual, Felsa 4010, 4015, 4017, 4018, 4019 [GR3700] MSRP: Was: Now: £12.00 Mainspring, 1.40 x 0.110 x 340 x 10.00, Manual, Felsa 4010, 4015, 4017, 4018, 4019 [GR3700]