Micro Ball Valves (barb x thread) Pk of 6

Micro fittings for regulating air flow through standard airline tubing
for devices such as air-stones, filters, protein skimmers, ornaments, etc. Also
for low pressure liquid feed lines for metering pumps, fish display holding
cubicles, fertilizing systems, calcium reactors, and drip irrigation of water
gardens and paludariums. Threaded fittings can be used for attaching to PVC
pipe walls to build manifolds for air or water feed. Available with barb x
barb, barb x thread, and thread x thread ends. 

Pack of 6