RMT 30 Oil Bottles lubricates Pneumatic Tools using ONLY mineral oil. Air flows through the lubricator from the air inlet, partly directly to the pneumatic machine and partly through the air pipe into the oil chamber. It works on the ejector principle. These 1.3 liters (.34 gallon) capacity lubricators are mostly used with handheld pneumatic tools. Because of its “turtle” shape, it withstands the rough handling and dragging on the job sites. Refilling is easy and fast. The use of RMT 30 reduces the wear of the tool and thus the need for the tool’s maintenance.