YBN SLA 101 (Self-Lubricating) Series Chain weight only 8.90z / 253 grams and it uses a patented technology which applied the self-lubrication material (Ni-PTFE Teflon) on the surfaces of chain plates and rollers which let chain keeps high performance running smoothly and quietly with minimum maintenance and cleaning. The average life cycle of SLA 101-Ti chain is about 6000 Kilometer ~ 8000 Kilometer which is much longer than other regular chains’ life cycles. This result was tested with a bicycle loaded 87KG weight and running speed of 30 Kilometer per hour. Made in Taiwan.