MM1 Maintenance Oil pen which comes with a 12ml (0.41fl.oz.) compartment which is 50% larger then the former LGB Oiler that is not available any more. The fully synthetic oil is 100% resin and acid free and the perfect assistant for you model train needs. The 40mm nondrip valve reaches any corner of a model train. A plastic cap protects the nozzle opening and prevents unwanted loss of oil during transport and handling.