The new generation Z-Ring seal, patented since 2003, featuring a special-designed conical shape on their inner side, represent the evolution of previous X-Ring and Z-Ring designs. The Z-Ring flexes when assembled, creating a spring effect that guarantees the seal will not decrease over time. The special Z-Ring section provides enhanced chain flexibility. The conical section enhances the assembling on the bushing. The lubricant trapped between the plates and the lobes of the Z-Ring keeps the ring lubricated and increases its life.