SPEEDO 48K. SENTRA 14 MPH, SV, from 8/13. SENTRA 15 MPH, SR. SENTRA 15 MPH, SL. SENTRA 14 MPH, FE, from 8/13. SENTRA 14 MPH, SR, from 8/13. SENTRA 14 MPH, SL, from 8/13. SENTRA 15 MPH, FE.