Porta-Nails 50232 Air Dryer Kit Includes Two In-Line Desiccant Dryers Includes Pig Tail Assembly 3/8 In. x 12 In. (w/ (2) 1/4 In. Male NPT) Includes 1/4 In. Body Size Connector Plug (1/4 In. Male NPT) - Includes 1/4 In. Male Body Size Coupler (1/4 In. Male NPT) Traps dirt, grime and oil