THE NORTON COMPANY GEMINI BENCH AND PEDESTAL WHEEL IS A SET OF TWO WHEELS WITH DIMENSIONS OF 10X1X1-1/4 INCHES OR 254MM X 25MM X 32MM. CLASSIFIED AS A GEMINI BENCH AND PEDESTAL WHEEL TYPE, THE SET IS RATED FOR A MAXIMUM ROTATIONAL SPEED OF 2485 RPM. THE COARSE GRIT SPECIFICATION IS 36/64, AND THE BRUSHING SIZES AVAILABLE ARE 1, 7/8, AND 3/4.