Team Associated - Factory Team 12mm Piston 2x1.5mm,Features: For the Factory Team 12mm big bore shocks Precision CNC machined plastic for the best fit within the shock body to improve handling and consistency Tapered for independent tuning of compression and rebound Four 0.051" (1.3mm) diameter holes per piston,Includes: (4) 12mm 2x1.5mm Shock Pistons,Specs: Diameter: 0.47" (12mm) Hole Diameter: 0.059" (1.5mm),Part number(s) included (in factory packaging):