Each oiler is crafted from resilient steel, with a corrosion-resistant epoxy coating, and comes in the 6 oz. size with or without base holder. Precision machined tips lift oil filler dust caps, and have a .15 inch diameter ledge-cone. Rigid spouts are non-detachable, whereas flex spouts are detachable and feature a 1/4 inch - 28 base thread. This quart-sized oiler features a 6 inch rigid spout.