1, 90° hose elbow with 1/4 inch left hand thread for connecting controllers or hoses to pipes and fittings. 2, 1/4 inch left external thread and a 1/4 inch left internal thread. 3, Practical for use at the controller output to prevent damage due to kinking of the hose line. 4, Material: Brass. Brand Unbranded MPN Does Not Apply UPC Does Not Apply Feature ESCP Material Brass. Type Gas Connector 90°1/4" Left Angle Brass Connector Country of Origin China .