BrassCraft® Speedi Plumb® PLUS 3/8 in Compression inlet x 3/8 in OD Compression outlet with Nut and Brass Sleeve flexible braided polymer water connector is corrosion resistant inside and out. Used to connect the water supply to a faucet with pigtail connections (copper tube), this connector features a high tenacity, multi-filament yarn, protected by a special polymer coating for optimum corrosion resistance and durability. On the inside, our tough PVC tubing resists attack by chlorine, chloramines and other corrosive elements. The braided polymer fibers are designed to bend freely without kinking or crimping.