Offaly will have the chance to win back-to-back Leinster under-20 hurling titles for the first time since 1992.
2-3 from Shane Rigney saw them beat Kilkenny by a single point in Tullamore last night.
And David Purcell scored 2-1 as Dublin beat Galway 4-17 to 20-points in Portlaoise.
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That final will be played next Wednesday.