Tsubaki PC chain offers a cleaner and longer lastingalternative to stainless steel chain, for applicationswhere corrosion and a lack of lubrication are a problem.Engineering Plastic Combination Chain (PC) uses stainless steel outer link plates and pins for strength, it also employs resilient engineering plastic inner links to reduce weight and improve wear life, without lubrication. Being far lighter than stainless-steel chains an additional benefit is lower noise.