2.5" Rockwell replacement, Flange mount, NEMA 4, Class I DIV II, double bearing with shaft seal, 80 lb shaft load, Resolver Absolute, Programmable from 1 to 1024 count, 5-30V power, 5V output, Side connector, 19-pin Single Line Absolute Quadrature Incremental Encoder with Index and complimentary outputs, with Mating connector, Standard Aluminum case