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This looks like a 100uf, 25V, Aluminum Electrolytic capacitor.
Click here for the closest items we carry,
You will have to match up the size of the plastic base (Surface Mount Land Size) to insure it will fit on your board. There are 6.6mm X 6.6mm, 8.3mm X 8.3mm and 8.4mm X 8.4mm in the list.
If you need help selecting one, just take some measurements, along with the diameter and height, and post it here.