The Swivel Fittings (Patent #4,946,204) are available in three models. the Straight Swivel, The Swivel Elbow and the Swivel Tee. They are available with barbs for 1/16", 3/32", or 1/8" I.D. flexible tubing. They are available with 10-32 UNF threads, 1/8-27 NPT or 1/4-18 NPT. The unique design (Patent #4,946,204) allows the fitting to swivel 360º. The snap type fitting is sealed with a Buna-N o-ring. The fittings are precision molded of nylon. (Check Chemical Compatability of Polysulfone.)