Self sealing design – no waste, no spills. Two ounce polyethylene bottles are matched with a 1" (2.54 cm) stainless steel capillary tube for the controlled dispensing of a wide variety of liquids, including solvents. The answer for fluxing applications without spilling, dripping or gummy residue. Each size tube has a different color hub for color coding of bottles. Needle adapter will also accept your own custom-sized needles with standard luer hubs.