The Rooftop 360 Grease Containment System is revolutionizing the rooftop system market. Simple expandable "Flex Frame" design fits fan curbs ranging from 3"- 34" in diameter. The system provides 24" of rooftop surface protection around the fan. The system installs easily (approx. 1 hour). The kit comes complete with 4 - 24" X 58" filters and all components needed to install.
Filter media - 5 layer design
Top - Pre-Filter Dispersement Layer Made Of Fire Retardant Material (FMVSS 302) Holds Grease And Serves As A UV Protectant
Middle - Quadruple Heavy Duty Oil Only Absorbing Layers Made From Fire Retardant (FMVSS 302) Material 
WARNING: This product can expose you to chemicals including Formaldehyde and 1,3,5-Triglycidyl-s-triazinetrione, which is known to the State of California to cause cancer. For more information, go to www.P65Warnings.ca.gov.