Exellant quality. ! Castings  made in USA . A fully assembled  unused PM research  3B1 engine  Bore ½" - Stroke ¾" - Double ActingThis engine is similar to those used to provide line shaft power to factories and mills in the 1800s. The line shafts conveyed the power to machinery via pulleys and flat leather belts.With a 2¼" flywheel and an overall length of 6",  Finished in red and black mounted on a wooden base ready to be powered by your boiler.Some dust included!  For mor information pleasecontact us  at  [email protected] or on 01594368318.