The 63PT-6X from BrassCraft is a 3/8” Compression Insert, Lead-Free. It's used when installing 3/8" OD plastic tubing in conjunction with 3/8" OD compression fitting in order to stiffen the pipe and prevent leakages caused by deformation. Made from lead-free brass and approved for potable water use. Made in the USA.

Technical Specifications:

• For use with: 3/8" OD (1/4" Nominal/CTS) tubing;
• Max Operating Pressure: 200 psi;
• Material: Lead-Free Brass, approved for potable water use;
• CSA Listed, NSF/ANSI 372;
• Made in the USA.