Info:B&B Manufacturing Powerhouse™ HTD® 25-5M15-6FA3 Type 6F Timing Pulley, 1/4 in Finished Bore, 1.521 in OD, 25 Grooves, 1.566 in Dia Pitch, 0.78 in W Face
Info:B&B Manufacturing Powerhouse™ MX 25-8MX36-6FS6 Type 6F Timing Pulley, 1/2 in Minimum Plain Bore, 2.443 in OD, 25 Grooves, 2.506 in Dia Pitch, 1.859 in W Face