Compatibility: Designed to replace part numbers 529437003, 529437004, and 529437001, ensuring a perfectly fit for 18V cordless blower models P2108, P21081, P21081VN, and P21081VNM Easy Installation: Simple to install in minutes—remove screws, detach the damaged fan, snapping the housing back together, and reinstall screws; not special tools required Securely Fit: Features an insert nut design for firm installation, with an outer diameter of 3.7 inches and thread depth of 0.21 inches, ensuring stability during use Replacement: Engineered as a replacement part for consistent, this blower fan is ideal for maintaining your equipment ’ s efficiency and longevity Construction: Made from with precise structure, this blower fan durability and good for stable operations, Manufacturer: Itkcozcg