The Onset Introductory Order comes with everything you need to try buffering, including one Onset Mixing Pen, and a one-month supply of Onset Sodium Bicarbonate buffering solution and Cartridge Connectors. •The Onset Introductory Order comes with enough supply of Onset buffering solution and cartridge connectors to buffer 80 local anesthetic cartridges •A reusable Onset Mixing Pen SPECIFICATIONS Brand: OnPharma Product Type: Onset One Box Dispensing Method: Mixing Pen Ingredients: Sodium Bicarbonate Color: Green (Pen) Reusability: Reusable Kit Contents: 1 Mixing Pen; 4 Pack of Sodium Bicarbonate; 4 Pack of Cartridge Connectors; Cleaning Brush and Onset Quick Reference Guide Package Quantity: 1