We have been manufacturing and supplying Piston Rings for over a century (established 1874). Our most famous marine piston rings are world renowned and we are also part of the Daros Group, of Gothenburg, Sweden. SPR sell both 2 stroke and 4 stroke type rings, from 180mm diam. to 1050mm diam. We also sell around a half a million Industrial application rings per year.SPR does supply rod ring, and keeps constant large stocks of many products, available for immediate despatch to any location world wide, from here in Rotherham. We promise we will give you good prices and excellent quality and service.