Compact, convenient 4 oz. polyethylene bottle with stainless steel pump action lid. dispenses just the right amount of flux or other liquids. Pump the lid lightly and the fluid is dispensed into the well. the one way pump holds the fluid in the well of the cap, preventing contamination of the unused fluid. For best results and to avoid clogging, the well should be emptied and the cap cleaned between uses. Flux not included.