DC 250 CFM Flangemount 4' Blowers Features: * Tough Reinforced Plastic Housing * Mount to any Flat surface * Slip-On Inlet Ducting Connection * Efficient High Volume Air Flow * Low Current Draw * Corrosion-Resistant Materials Throughout * N.M.M.A. Type Accepted * Meets USCG Regulation 183.410 and ISO 8846 MARINE for Ignition Protection * Complies with Complies with ISO 9097 MARINE Warning [https://productimageserver.com/prop65/6pt.png]WARNING: This product can expose you to chemicals including NICKEL (METALLIC) which is known to the State of California to cause cancer. For more information go to P65Warnings.ca.gov [http://P65Warnings.ca.gov].