PRO Racing Quality Alloy, Steel & Stainless Steel Weld On Fittings – AN3, AN4, AN6, AN8, AN10, AN12, AN16 & AN20 PRO Racing Quality Alloy Weld On Hose Barb – 5/16 (AN5), 3/8 (AN6), 1/2 (AN8), 5/8 (AN10), 3/4 (AN12)
PRO Racing Quality NPT & Metric Weld On Fittings – 1/8, 1/4, 3/8, 1/2 & 3/4 NPT – O2 Sensor Ports M18x1.5 Metric