Features: Enhances your blower's efficiency with our 12cm stainless steel ducting, designed to fit a variety of blowers including hand cranked models and electric ones ranging from 12v to 220v. Crafted from stainless steel, this extension duct is available in three sizes (38mm/40mm/42mm) to ensure a perfects fit for your blower or exhaust fan, providing a reliable and long lasting solution. For professional in construction and diy enthusiasts alike, this versatiled ducting accessory is a must have for anyone looking to improve their ventilation or cooling systems. Whether you're working on a home renovation project or need to enhances airflows in a workshop, our blower specific stainless steel ducting is the perfect addition to your toolkit. Easy to install and universally compatible, this stainless steel ducting not only keep your blower at a safe distance from heat sources but also ensures efficient air transfer for various applications. Specifications: Component:Stainless Steel Size:Approx.120x38mm/4.72x1.5inch Size:Approx.120x40mm/4.72x1.57inch Size:Approx.120x42mm/4.72x1.65inch Color:Silver Package Includes: 1pcs Extension Air Duct note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you donot mind befores you order. 2.Due to the differences between different monitors, the picture may not reflect the actual coloring of the item. Thanks for your understandings.