The Econo Wall Mount Grease Containment System is designed as a super affordable solution for wall mounted exhaust fans. Install and services in minutes. This system comes with four (4) clips that easily screw into the bottom lip of the fan. The custom manufactured grease filter (absorbent sock) fits inside the clips. The grease is then encapsulated into the absorbent sock. After the initial installation of the wall mount system, only the absorbent sock (filter) needs to be replaced during regular scheduled cleanings depending on the volume of the restaurant. The absorbent sock is easily disposed of and provides an affordable solution for those hard to contain grease issues associated with wall mounted fans. Includes one (1) 9.5 ft absorbent grease sock. WARNING : This product can expose you to chemicals including Cobalt Metal Powder 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 . SOLD 1 KIT PER CASE