Harrows Quadro 240 Dartboard – Professional – African Sisal. A true darting cult classic has returned; Quadro 240 is back. Last available in the mid 1990’s, darts fans around the world have clamoured for this iconic board to make a return for more than 30 years.This modern version of the Quadro 240 board features: Ultra-thin hardened wire, Fast healing SMART sisal technology, CLEAR SIGHT number ring, completing a truly modern look for this instant classic