Comparison : Item # 1031-5603-02-02-02-FG, 1/8"-27 MPT x 1/8"-27 FPT x 1/8"-27 MPT Forged Steel MP-FP-MP Run Tee
Item # 1031-5603-04-04-04-FG, 1/4"-18 MPT x 1/4"-18 FPT x 1/4"-18 MPT Forged Steel MP-FP-MP Run Tee
Item # 1031-5603-04-04-04-SS, 1/4"-18 MPT x 1/4"-18 FPT x 1/4"-18 MPT Stainless Steel MP-FP-MP Run Tee
Item # 1031-5603-06-06-06-FG, 3/8"-18 MPT x 3/8"-18 FPT x 3/8"-18 MPT Forged Steel MP-FP-MP Run Tee
Item # 1031-5603-06-06-06-SS, 3/8"-18 MPT x 3/8"-18 FPT x 3/8"-18 MPT Stainless Steel MP-FP-MP Run Tee