... stainless steel flexible pipe joint coupling 1. specification:1/8'' - 4'' 2. material: AISI 304, 316 3.flexible pipe joint co ... stainless steel flexible pipe joint coupling1. specification:1/8'' - 4''2. ... , could produce all kinds of stainless steel and carbon steel pipe fittings,including couplings, nipples, valves, elbows, tees, crosses, spuds ...