On Monday, December 5th, 5th Blues North A will take on Blues South A at Abercwmboi (Kick off 7.15pm).
In the other semi final to be played on Tuesday December 6, Afan Nedd will tackle Bridgend at Ystradgynlais (Kick off 7.15pm).
Blues North reached the semis after topping Group 1 with an unbeaten record having disposed of Bridgend, Scarlets West and Swansea. Meanwhile their opponents in the semi final, Blues South A, finished second in Group 2 winning two of their three pool games.
Afan Nedd had an unblemished record en route to the semis with wins over Blues South, Dragons and Scarlets East while Bridgend won two of their games in Group 1 to make the final knockout stage.