Stainless Steel insert fittings are available in a variety of sizes and fitting types. The elbows have been designed with a smooth sweep channel to minimize friction loss. This ensures the highest possible flow rates and pumping efficiency. Boshart Industries recommends using both gray stainless steel PTFE tape and gray magic pipe thread compound together for joining stainless steel threaded fittings. Boshart Industries, MASS-125-100, Swaged Adapter, Series: MASS Series, Fitting/Connector: Adapter, 1-1/4 x 1 in Nominal, MNPT x Insert End Style, 3.77 in Length, 304 Stainless Steel, Import