Abstract: An apparatus for wrapping an article, such as a bale of silage, in a stretchable polymeric film comprising a pair of stretch rollers for stretching the film, a film dispenser for delivering the film to the stretch rollers and means for rotating the article to take up stretched film from the stretch rollers. The means for driving the stretch rollers comprises at least one first hydraulic motor, and the means for rotating the article comprises at least one second hydraulic motor, and the at least one first hydraulic motor and the at least one second hydraulic motor are connected in series. The at least one second hydraulic motor is run at least partially on the exhaust from the at least one first hydraulic motor such that the ratio of outputs of the at least one first hydraulic motor and the at least one second hydraulic motor is fixed.