We love our 18-410 Black Treatment Pumps as these pumps give a professional and sleek look to products. This 18-410 Black Cream Pump comes with a clear over-cap and works great with our amber, blue and green glass essential oil bottles, or any bottle with an 18 mm neck. The perfect addition for all your aromatherapy products!  Treatment Pump has a 4" Dip tube so will fit all sizes of Essential Oil Bottles.  The dip tube will have to be cut to length for shorter bottles.