Brasscraft 62-8-6 3/8 by 1/4 O.D. Reducing Union, Rough Brass BrassCraft Compression Fittings do not require any flaring, soldering or other type of tubing preparation Available in a broad range of sizes and styles Manufactured from brass rod For use with potable water, instrumentation, hydraulic and pneumatic systems Designed to be used with aluminum, copper and plastic tubing Not recommended for steel tubing Plastic tubing requires 63PT insert and 60PT sleeve