Veris AA28 SKU: AA28 $162.13 (0)No Reviews yet Quantity -+ Add to Shopping Cart Limited Factory Stock Details CO2 span calibration gas, 0ppm concentration, 17 liter canister. For use with AA01 or AA40 (Additional shipping or handling charges may apply. Contac... Details Back DetailsCO2 span calibration gas, 0ppm concentration, 17 liter canister. For use with AA01 or AA40 (Additional shipping or handling charges may apply. Contact sales@energycontrol.com for a quote.) Reviews 0 Back Ratings & ReviewsNo reviews availableBe the first to Write a Review