The Slimduct 3.75" Duct 78" Length Black 100 is the perfect solution for mini-splits, high-velocity, and conventional A/C systems. Designed with durability and ease of maintenance in mind, this ducting system is engineered to meet the demands of modern cooling applications. Crafted from high-quality materials, and Heavy Duty Grade ducting ensures long-lasting performance, providing a reliable and efficient pathway for air circulation.