The SUM Series of stainless-steel miter gears come in 10 sizes in Module 1 to Module 3 in both 20 and 25 tooth styles. These gears are made of SUS303, conform to precision grade JIS B 1704 grade 3 standards, and offer 6 to 20-mm bore sizes and 16 to 65-mm hub diameters.Quality Transmission Components, Division of Designatronics Inc., 125 Railroad Ave., Garden City Park, NY 11040, (516) 437-6700, www.qtcgears.com/QTCPress/SSMiterGears.htm