4x Red Edition Super Soft Flex Leaf Springs Our new flex leaf springs are 35% softer than stock, manufactured out of high alloy spring steel. Offer more flex and improve articulation! Click here to read a review about these leaf springs on Scale4x4 Specifications: Super dubrable Steel Leaf Springs. Works on Tamiya F-350, Hilux and RC4WD Trail Finder Stiff spring increases payload capacity Simple installation, no modification required Eye to eye distance: 120.57mm / 4.746in Shown installed on Scale Semi Truck Front Axle (Blue) (VVV-S0108) for example (Not included) What's Included: 4x Flex Leaf Springs (Red Edition) Notes: Fits Scale Semi Truck Front Axle (Blue) (VVV-S0108) (Z-S0570)