If it is the one I am thinking of, there are two options, the "complete kit" and an extension kit. They work great for customizing the current in your tank. Petsmart.com has one kit for like $17 the other is like $40 basically you get a bunch of fittings that you assemble the way you want. http://www.petsmart.com/global/prod...59782&itemNo=91&Nao=72&In=Fish&N=2030059&Ne=2
They work great but IMO are fugley.
They work great but IMO are fugley.