Matt Black E-Adapter G3/8" to IG1/4" 1.True Extreme-Flow Design In G3/8" Thread Application. 2.Hi-Quality Brass Material. 3.High Quality E-Plated Finished In Deep Black Color. 4.Hiding O-Ring Design. 5.Design For Eheim Pump 1046/1048 In-let and 1250 Out-let. 6.RoHS Compliant. Thread : G3/8" To IG1/4" Thread : G3/8" Thread Length : 10MM Thread : Inner G1/4" Thread Length : 8MM