Two Little Fishies ATL5460W 6-Pack Micro Valve Barb X Barb Two Little Fishiest Micro Valve Barb X Barb Micro Fittings For Regulating Air Flow Through Standard Airline Tubing Also for low pressure liquid feed lines for metering pumps, fish display holding cubicles Two Little Fishies Micro Valve Barb X Barb Micro fittings for regulating air flow through standard airline tubin Also for low pressure liquid feed lines for metering pumps, fish display holding cubicles