G1/4" Matt Black IG1/4" Extender 1.True Hi-Flow Design. 2.Hi Quality Brass Material. 3.High Durability Nickel Finished In Matt Black Color. 4.Hiding O-Ring Design. 5.Design For Extend IG1/4" Thread In 5.5MM. 6.RoHS Compliant. Features Thread : G1/4" And Inner G1/4" Thread : G1/4" Thread Length : 5MM Thread : Inner G1/4" Thread Length : 5.5MM