Shop › Incentive Spirometer AirLife Adult 4000 mL, 12/Case #001901A Image 1 of 3 Image 2 of 3 Image 3 of 3 Incentive Spirometer AirLife Adult 4000 mL, 12/Case #001901A $75.99 Easy to Perform Breathing ExerciseErogonomically Designed to HoldAdjustable Mouthpiece with Flexible Tubing1 way valve Add To Cart Added! Easy to Perform Breathing ExerciseErogonomically Designed to HoldAdjustable Mouthpiece with Flexible Tubing1 way valve