Peters Spares PS14 Triang Hornby S6114 0-4-0 Pickup Spring - Replacement (Also on service sheets as S6614)
Fits: 0-4-0 Like: Nellie, Polly R252 R355 R359 R559 R52 Steeple Cab and some others.
Push it on give & make sure the ends rub on the wheels and away your loco will go!
OO Gauge