8"x2" (200x50) Pneumatic Caster Wheel Assembly with Bearings for Invacare Power Chairs (1002002) Spark Plugs 4-prong versions will have a

4-prong versions will have a serial number of D51157 (CTLDC1574)

Pride uses two of these motors for their dual infinite motor/heat & massage system

The 9" rear wheel assembly for the  for Golden BuzzAbout (GP164)

Golden Motor Technology: PI-400

8"x2" (200x50) Pneumatic Caster Wheel Assembly with Bearings for Invacare Power Chairs (1002002) Spark Plugs 4-prong versions will have aOur 8"x2" pneumatic Invacare caster wheel assembly with bearings for Invacare power chairs provide a smooth, flat free ride. Please check the Compatibility tab for a full listing of known compatible models. It is recommended that power chair caster wheels be replaced in pairs, due to variations in wear patterns and color fading of older gray caster wheel tires. Invacare: 1002002