"OPTICAL INCREMENTAL ENCODER; 3.450 IN. LG; 2.370 IN. DIA; CONNECTOR IS MOUNTED ON SIDE OF UNIT; INPUT VOLTAGE RATING 5 V; 2 CHANNELS WITH NO INDEX,SQUARE WAVES-LINE DRIVER OUTPUT; COMBINATION SYNCHRO/FACE MOUNT SLEEVE SEAL BASE; 1.875 IN. DIA; 3 EQUALLY SPACED MOUNTING HOLES; 10-32 THREAD SIZE; 0.380 MIN THREAD DEPTH"