The Forerunner 4-¾” Green Disc is a top-tier racing lane disc designed for competitive swimming pools. Part of the renowned Forerunner series, it features advanced wave-dampening technology that significantly reduces water turbulence, enhancing swimmer performance. Made from UV-stable resin plastic, this disc resists fading and deterioration even under intense sunlight, ensuring long-lasting use. Equipped with a Hydromatic propulsion system and compatible with the Supertensioner device, it maintains proper lane tension and wave control.