VS & OC Default: ITOH DENKI PM635FS-20-723-D-024-OS; 2.5"OD ROLLER; 24VDC; 29.25" B.F.; 11/16" THREADED HEX SHAFT; 2x50A17 SPROCKETS; WITH CBM-105FN/FP DRIVE CARD; SEE DRAWING FOR SPROCKET LOCATIONS