G1/4" Matt Black Mini Dual G1/4" Extender 1.True Hi-Flow Design. 2.Hi-Quality Brass Material. 3.High Quality E-Plated Finished In Deep Black Color. 4.Hiding O-Ring Design. 5.Design For Dual G1/4" Application. 6.RoHS Compliant. Thread : G1/4" On Both Side Thread Length : 5MM