3/8", sharkbite push to connect elbow, makes a 90 degree connection to any combination of 3/8" copper, cpvc or pex pipe, easy way to join pipe & do not require soldering, clamps, unions, glue or tools to complete the job, just insert the pipe & the stainless steel teeth bite down & grip tight, while a specially formulated o-ring compresses to create a perfect seal, disassembly is just as fast using the simple disconnect tool, can be rotated after assembly for easier installation in tight spaces, certified for potable water supply & hydronic heating applications.