This is an extremely high quality billet aluminum power steering fluid reservoir. I have taken the liberty of giving it a fresh polish job. The unit measures 3" diameter by 7" tall (not counting fittings and filter). I don't know the brand name (not marked), but the top lid of the filter says Moroso, sooooo assuming the entire unit is Moroso???.  The top breather filter was smashed down into the top brass fitting, so I took the liberty of adding a copper tube/chimney to raise the filter a bit higher, it's epoxied onto the reservoir top cap.