This polymer flexible hose is used to supply water to the basin/kitchen faucet whose thread is 1/2”NPSM. The inlet of this connector is 1/2”MIP for wall side. The outlet end is 1/2”FIP which connects to the faucet.
We use non-toxic beveled rubber washer with brass barb and stainless steel ferrule. The nut on both ends is brass material. We focus on each detail when assembling all the parts.