These Fineline Tips and Caps dispense most fluid media, allowing artists to use them interchangeably for fine linework and intricate designs on their support of choice. Made of durable stainless steel, fine tips measure 1-inch long. - Fineline Tips and Caps - Fine Tip, 20 Gauge, Pkg of 3Fineline Precision Applicator, FNELN CNVRTBL II 3PK - Caps fit most standard 1-2 oz plastic bottles with 5/8" openings.