I spoke to a REAL person when I called that was polite and knowledgeable of their product. The motor seems to be great quality and it works great! Highly recommend, will buy from them again if I need air compressor parts.
2 Pack 3/8" Brass Compression Sleeve
Use this 2-pack of 3/8" brass compression sleeves with copper, aluminum, and thermoplastic tubing. Not recommended for steel tubing. Manufactured for low and medium pressure tubing connection work where excessive vibration or tube movement is not involved. Not recommended for application using gaseous media.
Features
• 3/8" compression sleeve
• Temperature range: -65°F to +250°F (-53°C to +121°C)
• Tolerance: +/- .02
• Meets specifications and standards of ASA, ASME, and SAE
• Contains lead