B6125M Key Features. B6125M Specifications. Index sets include customizable tabs that are readable from both sides. Designed for use with all catalog rack countertop models 6G, 12G, 18G, 24G, and 30G, desktop models 906G, 912G and 918G as well as starter set models 966RS3G, 912RS3G and 66RS3G.
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