G1/4" Black Sparkle Compression Fitting For ID 8MM OD 11MM Tube 1.True Hi-Flow Design. 2.Hi-Quality Brass Material. 3.High Durability Nickel Finished In Black Sparkle Color. 4.Hiding O-Ring Design. 5.Design For Tube ID 8MM OD 11MM Application. 6.RoHS Compliant.