... 3.Min quality:1000sets 1) Product: PISTON RING2) Dia of PERKINS :101.05mm(4cyl).3) Material and type : as client requirement ... ,alloy,and etc(we can do as customer's request)4)surface treatment:polishing,plating,oxidation,phosphating,and etc(we can ... :as customer's request 6)prduct advantage:reduce fuel consumption Perkins 4.248 Piston Ring