CLEAR TUBE GREASE GUN BARREL, FITTING END (IN.) 2.280 X 16 UN, FEATURES CLEAR TUBE GREASE GUN BARREL ALLOWS CLEAR IDENTIFICATION OF GREASE TYPE THEREBY ELEMINATING CHANCE OF USING INCOMPATIBLE OR UNSPECIFIED LUBRICANTS, FOR USE WITH WESTWARD GREASE GUN HEAD & PLUNGER ROD ASSEMBLIES, INCLUDES POLYCARBONATE CLEAR TUBING FITTED WITH MACHINED ALUMINUM ADAPTORS