... coupling for pex-al-pex&pert-al-pert ,high quality brass material (hpb58-3) and low price ,high safety. M-1S16 ... *3/4FM-15S32*1FM-16S32*11/4FM-17S32*11/2F brass press female coupling ,press fitting ,for pex -al -pex ,made ... treatment be plating and nickle plating .advantage : quality : high quality brass rods material ,cold cut and hot forge processing compact structure with ...