These Associated factory replacement shock pistons are designed for the TC7.1 platform and fit within the TC-6 and TC-7.x Electric Sedan series. The 1.1G SS designation indicates the specific hole geometry and sizing that governs damping characteristics, making it important to match this spec to your current shock setup. Sold as a set of four pistons. Features: TC7.1 platform spec 1.1G SS hole configuration Set of four pistons Direct factory replacement for TC-6 and TC-7.x shocks 7/7/26 cs