The Ryobi Electric Tools 204928003 Chainsaw Grease Tube & Cover Rod Plunger Assembly delivers controlled lubrication to critical moving components. This assembly channels grease from the reservoir through the tube, while the plunger mechanism helps regulate flow during use. As the chainsaw operates, the system ensures grease is evenly distributed to reduce friction between the bar and... https://www.wholetoolbox.com/ryobi-electric-tools-204928003-chainsaw-grease-tube-cover-rod-plunger-assembly