The 1.5 HP blower is designed for the CenturionPro® Mini with over 2000 CFM suction power. The industrial 3 HP blower is customized to work with the CenturionPro® Silver Bullet and the CenturionPro® Original with an air capacity of 2750 CFM. The industrial 4 HP blower is customized to work with the CenturionPro® Gladiator offering over 3000 CFM of suction power. Each blower produces optimal results by working as the vacuum system. They effectively transfer the waste from the tumbler into the collector bag, sparing you from a large mess and reducing cleanup and maintenance times.