They are white not black as pictured but I don't care. I used them with the new Fluval 206 to hook up the CO2 reactor. Model 206 is for CO2 only. This works great if you can connect a 5/8" reactor to 1/2" tubing. Simply connect them to the 5/8" end of the reactor and the other end to standard 1/2" finned tubing. and use some hose clamps and it's good.
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