🌺Vòng sủi oxy 20inch (freeship)

20" Air Ring Diffuser Air Ring Diffuser  stainless steel rings high quality rubber air diffuser It is made from high-efficiency rubber with special designed pore size and its numerous pore distribution to create maxiumum fine bubbles which slowly realease into the water. The air flow is 0.45-1.1 cfm/ft (0.3-1 lpm/cm). Durable with low start up, maintenance and replacement cost. Air connection is 3/8"