The field cut riser system allows for easy on-site adjustability to bring your buried grease interceptor to grade by simply trimming unneeded height off the riser bodies. The ease and flexibility of this accessory eliminates job site delays while waiting for custom-built risers, ensuring projects finish on time and on budget. Features: Lightweight polyethylene Stack a maximum of two FCR1 risers to create a total height of 25" (sold individually) Topmost riser may be cut based on your determined riser height