Comparison : Item # 1317-20-510, 1/8" Tube O.D. x 1/4" Tube O.D. Push-to-Connect Reducer Nickel Plated Brass
Item # 1317-20-511, 5/32" Tube O.D. x 1/4" Tube O.D. Push-to-Connect Reducer Nickel Plated Brass
Item # 1317-20-512, 1/4" Tube O.D. x 3/8" Tube O.D. Push-to-Connect Reducer Nickel Plated Brass