Bitspower G1/4" to 3/8" ID, 1/2" OD Compression Fitting V3 for Soft Tubing, Silver Shining, 4-Pack For Tubing with 3/8" ID (Inner Diameter) and 1/2" OD (Outer Diameter) Thread: G1/4" Hi-Quality Brass Material Hidden O-ring Design Color: Silver Shining