The field cut riser system allows for easy on-site adjustability to bring your buried sampling port 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: Stack a maximum of three FCR10 risers to create a total height of 97" (sold individually) 8" corrugated drainage pipe (33" tall) and coupling Butyl mastic tape for riser joints (two rolls, 33", for securing riser and one piece, 6", for securing coupling)