Flywheels -- 11/16" x 3/8" x 2.4mm

Precision machined from brass stock, flywheels are drilled and reamed for slip fit on drive shaft. Each pack includes two flywheels, with Athearn couplings installed and complete instructions. Dimensions shown are outside diameter, length and shaft size. Can motor in Athearn S12, SW1500 and most short wheelbase locomotives.