A Kjeldahl digestion and distillation unit specification includes the unit capacity (e.g., 3 or 6 test positions), the type of heating system (e.g., mantle type, infrared), the material of construction (e.g., stainless steel, MS powder-coated), temperature control features (e.g., microcontrollers, auto-cut off), safety features (e.g., fume ducts, protective covers), and electrical requirements (e.g., voltage, wattage). Specifics like the distillation speed, sample capacity, and water consumption for the distillation unit are also critical.