We make 2-step, 3-step, 4-step, 5-step, and 6-step stair stringers. The stringers are cut out of #1 grade 2 x 10's and meet all code standards. There are 144 pieces in a pack, but they are also subpacked into 72 pieces and subpacked even further into 12 pieces. We sell stringers both untreated and ACQ treated.