Ok, width of the filter (outside the tank) is about 4"... I guess the length doesn't matter right?? *Smile* No, it comes with 2 extention tubes.. I bought a 3rd. Each tube has a "basket" on the end to catch debris... they interconnect. You'll understand better once you have it in your hands. Just checked my order from Big Al's and that's what it was.. came with 2.. and I bought an extra. Heck they're only like $1.99 each
Glad to help
(actual measurements- each tube is 6.5" from the part where it connects to tip of the basket... the part that comes out of the filter that you attach the intake tubes to is.. 3" from the lip of my tank.. a total of 4" from top to bottom...) If you need any further exact measurements.. just let me know
dimensions of the case are.. w-3", h-9", l-13"