The Countess™ cell counting chamber slides are designed specifically for use with the Countess™ automated cell counter (C10227). Comes as a box of 50 slides. Each slide contains two cell counting chambers. Also includes 2 mL of trypan blue. Comes with 50 slides that can measure 2 samples each, for a total of 100 samples, and 2 mL of trypan blue stain, 0.4%. Room temperature storage.