Unicorn Eclipse Ultra Dartboard - with UniLock. Features: New Radial Wiring System - incorporating a super-thin Bullseye Wiring. Injection Moulded High Definition Numbers and Invisible Number Ring. The new and improved Ultra Spider (patent pending) is designed to maximise dart retention and a specially designed ultra-bullseye helps achieve higher scoring. The Eclipse Ultra dartboard also features an ultra-vis number ring with high-definition numbers and invisible number ring to maximise focus. With improved ultra Sisal, make no mistake; this is a tournament quality board, and approved by the PDC.