This is the sleeve that I bought. It's 3' by 8" with an 18" grounding rod at the bottom. My plan will be to surround it with cement to the bottom and now need to figure out total cement diameter. I watched a video at lunch where a guy used an 18" cement round for the top 12" and then below that he did about 30x30" footing. The flag pole will be sunk 3' (limited by sleeve) and have 18' exposed. The sleeve gets packed with sand after the pole is installed which enables you to make adjustments and get plumb perfectly.
although I don't have any of the round rebar that Vash has recommended, I will probably add some rebar to the footing as I have several pieces laying around.
The Sleeve:
The Pole: I don't know the weight but it is heavy (definitely not aluminum). It will be painted.