A quad ring is a type of sealing ring with a square or rectangular cross-section, designed to provide improved sealing capabilities compared to O-rings. The four-lobed design of the quad ring provides improved sealing in dynamic applications and reduces the risk of twisting or rolling compared to traditional O-rings. Quad rings are commonly used in hydraulic systems, pneumatic systems, and other industrial applications. In Malaysia, there are various manufacturers and suppliers of quad rings available for purchase.