Tru-flex Metal Hose Corp Pfte-bbc6 Tee Csst 3/4"x1/2"x1/2" 3/4" x 1/2" x 1/2". Used for the continuation of a run of CSST. Used to branch off a new run of CSST. Works with CSST (Ace nos. 4365904 or 4365912).