This is a pair of V3 Short Course Closed Cell Foam Inserts from Pro-Line. FEATURES: Ideal for high speed indoor clay or outdoor blue groove tracks Offers high degree of traction Fits wider 2.0 short course tires Wide and flat profile for maximum sidewall support and greater contact patch on the track INCLUDES: Four V3 Short Course Closed Cell Foam Inserts SPECS: Outer Diameter: 3.6" (91mm) Width: 1.6" (41mm) Thickness: 0.27" (7mm) jxs 01/12/12 ir/jxs