www.airguardproducts.com/Products/Airguard-Blockage-Prevention/ The AIRGUARD Blockage Prevention System keeps the tubes of your air seeder free from plugging. Attaching directly to the air intake of your air drill, this oil cooler reduces your oil temperature and moisture levels for optimum product flow. The Airguard Blockage Prevention System may be the solution for you to help reduce your oil temperature and reduce plugging issues with your air seeder. Reduces oil temperature by 20C/68F. Heats air inside drill by 10C/50F. Drops relative humidity by 50%.