Z-ring chains feature the patented Z44 sealing rings, which greatly improve performance and wear life, making previous X-ring and Z-ring chains obsolete50% reduction in friction compared to traditional o-ringsConstant lubrication from special high-temperature grease in the critical pin/bushing area provides long lifeHigh-carbon alloy pins to minimize wear and increased roller thickness to prolong durabilityThicker outer plates and quad-riveting for greater tensile strengthRivet type link included