This is a pair of the 3 - 3.5" Robart Foam 3 Wheel Inserts. FEATURES: For Robart straight and diamond tread wheels 3 - 3.5" (76 - 89mm) in diameter INCLUDES: Two Robart Foam 3 Wheel Inserts REQUIRES: Inserting between wheel and tire SPECS: Length: 10.6" (270mm) Diameter: 1.1" (28mm) jxs 5/31/06 ir/jxs