These SWORKz Big Bore Shock springs are a factory replacement set for 1/10 scale BBS shock absorbers, spec'd at 61x1.2x10.5 for precise fitment on the S12-3 2wd Buggy platform. The AL4 spring rate designation makes it straightforward to select the correct tuning option for your setup. Sold as a pair of two springs. Features: AL4 spring rate designation for tuning selection 61x1.2x10.5 spec for Big Bore Shock compatibility Sold as a pair of two springs 1/10 scale fitment 7/7/26 cs