Qty. 1 2 3 4 5 6 7 8 9 10 Add to Cart PAX Flat Mouthpiece for PAX 2 or 3 - 2 pieces - is currently on backorder. You may still purchase now though and we'll ship as soon as more become available. Replacement flat mouthpiece for the PAX 2 or PAX 3. 2 pieces per pack.