Unique lever grease gun has seals designed for use with oils and light (flow able) greases without leakage. Hydraulic coupler is fitted with a ball check to prevent leakage. Will generate 5,800 PSI pressure with oil or grease. May be bulk loaded using Loader Nipple (Sold Separately). Supplied with 7" Rigid Extension and 4 Jaw Coupler. Approximately 21 strokes per oz.