This is a pair of replacement 10x15x4mm Bearings for the Axial AX10 Scorpion Rock Crawler. FEATURES: Stainless steel construction, silver in color Shielded to help keep the bearing running smooth and friction free YOU WILL RECEIVE: Two Bearings REQUIREMENTS: Installation following the model manual SPECIFICATIONS: Inside diameter: 10mm Outside diameter: 15mm Thickness: 4mm