This elbow piece is suitable for any 8mm (5/16") OD line (such as the EVABarrier 8mm (5/16") Double Wall Beer / Gas Line we supply). Great for a push-fit way to make hard turns where you're looking to tidy up your system, especially where clearance or space is an issue.
 
It's important to cut your hosing straight, not on an angle, to ensure the line has a complete seal - we highly recommend grabbing an inexpensive  Tube / Line Cutter for the job. To detach the fitting simply push in the collet and remove the hose. This fitting is suitable to be used up to 100 psi.