Heavy Duty Flexmount BlowerDC 250 CFM Flexmount Continuous Duty 4" Blower Extended Life 5,000 Hour Motor Tough Reinforced Thermoset Plastic Housing Mounts 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 Electrical Regulations to Title 33 Chapter I, Part 183 Subpart I and ISO 8846 for Ignition Protection Complies with ISO 9097 Marine CE Conforms with EN 5008-1 for Supression of Electro-magnetic interference 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. Specifications: Ducting: 4" Open Flow (CFM): 250 CFM Volts: 12v Box Dimensions: 11"H x 12"W x 14"L WT: 7.1 lbs UPC: 1067188052015 Owner&';s Manual (pdf)