Idler Chain Sprocket; 5/8" Bore; 40 Chain Size; 17 Teeth; Ball Bearing; 1/2" Chain Pitch; 1 Row of Teeth; Roller Chain; Hardened Teeth; 2.974" Outside Diameter; 0.72" Length Thru Bore; Steel

Roller Chain Sprocket; Minimum Plain Bore; 35 Chain Size; 20 Teeth; Ball Bearing; 3/8" Chain Pitch; 1 Row of Teeth; Hardened Teeth; Steel

Idler Chain Sprocket; 1/2" Bore; 35 Chain Size; 20 Teeth; Sleeve Bearing; 3/8" Chain Pitch; 1 Row of Teeth; Roller Chain; Hardened Teeth; 2.593" Outside Diameter; 1" Length Thru Bore; Steel