This is the Factory Team 12mm Front Hard Spring Kit from Team Associated. FEATURES: Fits the Team Associated #91314 (ASCC9314) & #91315 (ASCC9315) 12mm Big Bore front shocks for the B4.1, B44.1, T4.1, SC10 and SC10GT ASTM wire with black oxide coating with color coded shrink tubing to indicate spring rate INCLUDES: Two each Yellow 3.75, Red 3.90, and Orange 4.05 Springs SPECS: Length: 1.7" (43.4mm) Diameter: 0.74" (18.8mm) jxs 11/26/12 ir/jxs